The second law of Thermodynamics is that: Any process in nature occurs in a certain direction only. This does not condemn the first law of energy conservation.
Thank you for clarifying this! I had a hard time understanding how to use 2nd law formulas but now I can confidently apply them. You sir are the reason why I will pass my final this monday!
One of the greatest things I learned was to ask the prof a question once, keep my mouth shut if I didn’t understand, then look it up on RUclips later by a competent teacher.
You call this presentation "a minimum ues of mathematics"? You're dreaming. This is a highly technical explanation and is for people who already understand the second law.
I agree that saying “minimum use of mathematics” is pretty misleading, and it’s probably best used as a review for students. BUT i found this video very useful in completing my understanding of the second law rather than reinforcing concepts i already understood
#Entropy for a closed system ( like the universe ) , is always increasing . #A self-occurring process, the entropy in the final state is greater than the entropy in the initial state. #Heat is transferred from a body with a higher temperature to a body with a lower temperature. The substance goes from higher concentration to lower concentration . To do a work we need a delta ( difference in heat , or in substance concentration ) ; second law of therm-dynamics kills delta . *Life is struggle with second law of thermo-dynamics .* It is the one who wins in the end .
both wrong.. he saaid minimum use of mathematics.. i stiill did not understand,, and frustrated me bringing the universe into it,, as it that was simple
@@tijerinaivan Actually by universe, it doesn't mean we are talking about the entire cosmos including the galaxies and space. It's just used for the 'system' and 'surroundings' together.
For the calculations on 5:00 Case 1: When Q=+10 JQ=+10J This means 10 joules of heat are added to the system (the coffee). For the system (the coffee at 45°C or 318 K): ΔSsystem=10 J45°C+273=10318=+0.0314 J/K ΔSsystem=45°C+27310J=31810=+0.0314J/K For the surroundings (at 25°C or 298 K), the system is losing 10 J of heat, so we have Q=−10 JQ=−10J for the surroundings: ΔSsurr=−10 J25°C+273=−10298=−0.0336 J/K ΔSsurr=25°C+273−10J=298−10=−0.0336J/K Now, the total entropy change for the universe is: ΔSuniv=ΔSsystem+ΔSsurr ΔSuniv=ΔSsystem+ΔSsurr ΔSuniv=+0.0314 J/K+(−0.0336 J/K)=−0.00211 J/K ΔSuniv=+0.0314J/K+(−0.0336J/K)=−0.00211J/K So, the total entropy change is negative when 10 J is added to the system. Case 2: When Q=−10 JQ=−10J This means 10 joules of heat are removed from the system. For the system (the coffee at 45°C or 318 K): ΔSsystem=−10 J318=−0.0314 J/K ΔSsystem=318−10J=−0.0314J/K For the surroundings (at 25°C or 298 K), the system is losing 10 J of heat, but the surroundings are gaining 10 J, so Q=+10 JQ=+10J for the surroundings: ΔSsurr=10 J298=+0.0336 J/K ΔSsurr=29810J=+0.0336J/K Now, the total entropy change for the universe is: ΔSuniv=ΔSsystem+ΔSsurr ΔSuniv=ΔSsystem+ΔSsurr ΔSuniv=−0.0314 J/K+(+0.0336 J/K)=+0.00211 J/K ΔSuniv=−0.0314J/K+(+0.0336J/K)=+0.00211J/K Thankyou!
This video is very good if you're an engineering student trying to solve entropy problems. Philosophically understanding it though, not so much. The 2nd Law just states that entropy or the disorder of a system tends to increase with time. Fundamentally it just means there are far more solutions where the result is a mess than an orderly one. Think about a game of pool. Originally the balls are nice and orderly, but once things start moving, the balls end up all over the place. Now imagine trillions of particles doing the same thing. It is possible for entropy to decrease spontaneously but the chance of that occurring is practically impossible. This law is not so much a product of physics (like F=ma or energy conservation) but of statistics. It's an emergent property that comes about because there are far more states where a system is disorderly than orderly.
To get even more philosophical, there is no ORDERLY or NON-ORDERLY in the universe. It is there only in our minds. The pool balls are orderly only for a person who knows what pool is. For an alien from a planet where balls are prohibited, that particular arrangement would be just as disorderly as anything else. So now our second law's statement changes from a "ORDER ---> DISORDER" process to "SOME RANDOM STATE ----> SOME OTHER RANDOM STATE". It simply states that one state will move to some other state with time. If we cannot model the system exactly, after a time we will not be able to predict what that end state would be. So we end up with a lot of possible end states. So at the end what the second law says is "as time goes on states change, you can't expect things to stay the same. When more time passes, you will become less and less likely to predict what would happen". So the simplest statement of the second law is "time passes. things happen"
True. Unfortunately though the 2nd law is wrong in the sense that it is dependent on the boundedness of the observer who’s looking at the system. You can imagine the space of states tending towards an increase in entropy statistically in such examples (particles in a box) because the system takes the states-space to always be more (have more degrees of freedom) than the number of particles themselves. For example. You have 10 2dimensional particles, on a 10x10 grid, then there will always be an exponentially higher number of possible states the particles can be in and most of those states will be random in their distribution. The underlying state-space however is not in equilibrium, in fact it is highly ordered. You can imagine that if you interpreted each 2d particle as a black pixel(1) and every pixel that isn’t a particle as a white pixel(0) then the total system would be 000001000000000000100000….and so on. This is a highly homogenous distribution and *not* random. The 2nd law is therefor an artifact of how the observer parses the system…where if the observer could resolve the whole statespace they wouldn’t see an increase in entropy it would in fact never change…where as when you parse the system where you lose information it will appear that the 2nd law is true. It’s like ignoring the air molecules in a double pendulum experiment. Of course the 2body system will appear chaotic because one is simply ignoring and not taking into account the actual components of the system (air molecules). Cheers,
a very perfect explanation for the physics behind the law, i listen to the video 3 or 5 times and finally I can say that now I understand the second law of thermodynamics
So what I understood from all this is that energy always flows from "high to low", never the other way. Like water down a mountain. So any closed system that has any amount of entropy will always want to flow to 0. Any open system into which outside energy can be added will have entropy increase until that extra added energy is supplied no more, like a melting glacier adding water to a river, and once again it will go from "high to low" until we get an all stop at 0 entropy. All the water from the mountain has flowed. Or something like that.
Thank you for using as little math as possible,.... I may have gotten lost if you would have used nothing but math. Sure glad THAT didn't happen,... *: )*
Excellent instructional video that allows to approach an abstract theme with the minimum of mathematics. Concerning physical phenomena, it is better to "feel" them before handling them with maths. Thanks a lot
In simple terms: 1st law = total existing energy remains the same even with conversions to different states of matter. 2nd law = Useful energy (or efficiency of work) decreases with each transformation due to heat loss and entropy in general. For example, think of coal burning to heat water to produce steam to turn a turbine to generate electricity. Typically only 30-50% of the chemical potential energy stored in coal can be used to create electricity due to conversion losses at each step of the process.
Thankyou a thousand...... I'm suffering so much to understand this. Now I have a clear picture on entropy and the whole law. Please do a video on exergy. 💯💯👏🙏🙏
I take comfort in the 2nd law of thermodynamics knowing that all natural processes are irreversible, and that all things continue to move forward. Joe Pera
From first law of thermodynamics we know that the total energy of the universe remains conserved that is the sum of the energy in in system and surrounding before and after the reaction is conserved but a question should arise in our mind that what is the direction of this flow of energy is it flowing from the system to surrounding or the energy is flowing from the surrounding to system so this direction is given by the second law of thermodynamics. It's a mathematical analogy But in simple words you can understand it as if gibbs free energy of a reaction is less than 0 the reaction is spontaneous that is it does not need any external energy source that is there is no flow of energy from surrounding to the system so we can conclude that the energy is flowing from system to the surrounding
Many misunderstandings in understanding the problems of life and evolution from the standpoint of physics and physical chemistry are typically associated with misconceptions in understanding entropy. The term "entropy" coined Rudolf Clausius. According to his model of the world (universe), he presented a statement: "The energy of the world is constant. The entropy of the world tends to the maximum". Later this statement was chosen by JW Gibbs as an epigraph to the paper "On the Equilibrium of Heterogeneous Substances". These scientists have given this statement in relation to their model of the universe. This model corresponds to a simple isolated system of ideal gas, i.e. isolated system of ideal gas, energy and volume of this system are constant and in which only the work of expansion is performed. Entropy of such a system can only increase! It should be noted that when we say on ideal model, which would correspond to the real universe, it would be necessary to accept the unreal assumption that any form of energy real universe will be transformed into thermal energy. Only in this case, also under additional unrealistic assumptions, the real universe "would turn" into the model of ideal system of Clausius - Gibbs. However, lovers of science have applied representations on simple systems to systems of other types, in which the interactions takes place between particles of different nature (interactions of molecules or other objects of different hierarchies) and to systems which interact with the environment. Some scientists, who are not professionals in the relevant fields of knowledge, have not escaped such errors. This has led to unimaginable confusion. This has slowed down the development of science, more than on a century. There are thousands of publications in scientific journals and popular literature containing marked misunderstandings. To these were added incorrect ideas on the negentropy and on the dissipative structures in the living world, and the false identification of "the information entropy" with the thermodynamic entropy. The origin of life and its evolution can be easily explained from the standpoint of hierarchical near equilibrium thermodynamics of complex dynamic systems. This thermodynamics is established on a solid foundation of equilibrium thermodynamics - thermodynamics of Rudolf Clausius, JW Gibbs and other great scientists.
Good on you mate! Wish I had my priorities as straight when I was your age. I would recommend EE btw, best mix of pure physics, engineering and compsci out of the major disciplines. It's ultimately up to you tho, good luck!
+Navneet Yadav 😁 I like computers more so I will go for software engineering but also like to learn new thing no matter whether it is mechanical 😊 Gyan jaha se milta hai battor lo👍
The statements of the second law you crossed out are in fact the most useful for an engineer as they allow to develop intuition about the underlying physics. Formulae are an elegant way of stating laws of physics in the language of mathematics but that is not necessarily useful for understanding every day technical problems. The same applies to the abstract idea of entropy.
I think it’s stated that way in the sense of how some learn subjects! Some can’t apply ‘ intuition’ and ‘ abstract thought’ to math like Others can! That’s definitely how I understand math! If you try and tell me to just learn numbers I simply can not lol
1:37 states 2nd law is related to the direction of chemical processes while first law depicts the law of conservation of energy 2:45 states mathematical eqn. for 2nd law that total Entropy of an isolated system can never decrease
We also use these pumps in Iran, and our company specializes in repairs, winding and turning parts of these pumps, and we have been working in this field for 40 years.
The second law states that if the physical process is irreversible, the combined entropy of the system and the environment must increase. The final entropy must be greater than the initial entropy for an irreversible process: Sf > Si (irreversible process)
Dear Sabin + your esteemed audience, First of all, many sincere thanks for your collective efforts! "The "Second Law of Thermodynamics" is a fundamental law of nature, undeniably one of the most valuable discoveries of mankind. However, this law is slightly confusing for most engineers or students. The main reason for this is that it contains so many complex terms and there are many ways to phrase this second law, but most importantly the majority does not understand what the applications of this law are. In this video we will provide a real physical insight into this law with a minimal use of mathematics". ...Sounds terrific, but looks to be not for an average mind... Even big scientific research workers' brains had and still have to stumble herewith... Moreover, your report demonstrates the meanwhile widespread Operationalism (unwillingness to enter important details) easily muddled-up in the audience with the 'engineering rigour'... Hence, some kind of a clarification ought to be urgently necessary! So, captain, AHOY! A. There is ONLY ONE BASIC, fundamental Energy Conservation and Transformation Law. It is definitely unique and conceptually indivisible delivering two logically joint concepts - these are Energy Conservation - and Energy Transformation. Still, a more-then-100-years-old conceptual failure has brought us to two separate thermodynamic laws - but this has nothing in common with the actual physics. To come back, they have coined two more fake thermodynamic laws, employed the Probability Theory + Mathematical Statistics, and this has helped formulate the Quantum Mechanics, which is thus a basically metaphysical conceptual construction - and, hence, ought to be only restrictedly fruitful. B. By dividing the basically indivisible law, you are touching Combinatorics, you are touching Probability Theory, you are even stepping back to Thermodynamics for a while, but... You are NOT answering the poser: WHAT IS ENTROPY, sorry! 1. In the formula S = kB * ln(Ω) you do imply, Ω means not a "Huge Number of Microstates", not "Probability", which numerically ranges between [0,1], not even "Wavefunction", which ought to be a purely metaphysical notion, as it is... In effect, Ω ought to be a simplistic algebraic function of Lord Kelvin's Absolute Temperature. This result has been published 100 years ago in JACS. 2. WHAT-ENTROPY-IS-poser has been answered not by Clausius, not by Boltzmann, etc., but by Goethe, who has introduced Mephistopheles, the philosophical embodiment of ENTROPY. 3. Newton did basically know WHAT ENTROPY IS - A Counteraction. 4. That Counteractions do not grow to infinity with the growing Actions, but MUST reach their MAXIMUM values, is the result by Nicky Carnot, which has been formalized by Clausius... 5. In effect, J. W. Gibbs Free Energy formula: (ΔG = U + pV - TS, .i.e., ΔG = H - TS , where U is the internal energy (SI unit: joule), p is pressure (SI unit: pascal), V is volume (SI unit: m3 = m*m*m), T is the temperature (SI unit: kelvin), S is the entropy (SI unit: joule per kelvin), H is the enthalpy (SI unit: joule)) renders implicit the interplay among ALL the relevant Actions (the Enthalpic term) and ALL the pertinent Counteractions (the Entropic term). 6. The standard approach you are reporting about is OK for the implicit Enthalpy-Entropy picture, employing it for studying reaction mechanism details is likewise eating soup with a fork.🧐
@@ravenking2458 I dare to assure you that this is a definitely good news for you. Every birth is connected with some painful feeling... Many sincere thanks for your taking time to respond!
Many discrepancies in understanding the problems of life and evolution from the standpoint of physics and physical chemistry are typically associated with misconceptions in understanding entropy [4-7]. The term "entropy" was coined by Rudolf Clausius. Following his model of the world (universe), he stated: "The energy of the world is constant. The entropy of the world tends to the maximum". Later this statement was chosen by J.W. Gibbs as an epigraph to his paper "On the Equilibrium of Heterogeneous Substances". These scientists have given this statement in relation to their model of the universe. This model corresponds to a simple isolated system of ideal gas, i.e., an isolated system of ideal gas, in which the energy and volume are constant and only the work of expansion is performed. The entropy of such a system can only increase! It should be noted that when we speak about the ideal model that would correspond to the real universe, it would be necessary to accept the unreal assumption that any form of energy in the real universe will be transformed into thermal energy. Only in this case, and under additional unrealistic assumptions, the real universe "would turn" into the Clausius-Gibbs model of the ideal system. However, science amateurs applied representations of simple systems to systems of other types, in which interactions takes place between particles of different nature (interactions of molecules or other objects of different hierarchies) and to systems which interact with the environment. Some scientists, who are not professionals in the relevant fields of knowledge, did not escape such errors. This led to unimaginable confusion and slowed down the development of science for more than a century. There are thousands of publications in scientific journals and popular literature containing marked misunderstandings. To these were added incorrect ideas on negentropy and on dissipative structures in the living world and the false identification of "the information entropy" with the thermodynamic entropy. The origin of life and its evolution can be easily explained from the standpoint of hierarchical near-equilibrium thermodynamics of complex dynamic systems. This thermodynamics is established on a solid foundation of equilibrium thermodynamics, thermodynamics of R. Clausius, J.W. Gibbs, and other great scientists. www.arcjournals.org/pdfs/ijrsb/v5-i3/2.pdf
'My name is Ozymandias, king of kings: Look on my works, ye Mighty, and despair!' Nothing beside remains. Round the decay Of that colossal wreck, boundless and bare The lone and level sands stretch far away.
The captions and the transcription died at 3:14. Being deaf I could not follow the rest of the video. I really wanted to see this. The 2nd Law is important for a whole range of reasons and it appears to be widely misunderstood. I am looking at all explanations to help my understanding of it. Any chance you might fix the caption/transcripts?
I shall have to look at this video again. Lots of information to get my head around. I liked the info about Entropy .I did not know that before seeing this video.
3:25 entropy is heat transfer effect PLUS disorder deflating a balloon increases the disorder of air particles not totally sure what to say about falling mass
To be precise in the bottle where there are the two chemicals it should be used Helmholtz energy (A) since it is an isocore instead of in isobar process
I can see how the Entropy is increased once a falling object crashes on the floor, but the entropy shouldn't increase while it is falling (at least in vacuum). So why is it falling then? I don't think entropy is the answer.
Umm as a complete illiterate in thermodynamics I am afriad that this video was not enough😃 I do get the gist bit I think that it was too fast for me or that some part of "Noob you need to know this first" was missing. Could you for the future also list some prerequisites like PBS Space used to have?
It's not a big deal if it's too fast for you. Videos like this are more about a payload of information. Its purpose is to give you content to muse over, not that you should just understand and remember everything in real-time.
If this was a way to explain entropy to a newbie, it was - and is - a spectacular failure. I am going hunting for other, better-explained videos on the topic.
May I request to please correct me if I am wrong. Wikipedia meaning of explosion: An explosion is a rapid increase in volume and release of energy in an extreme manner The applications of explosion in the system the principle of Thermodynamics fail. The Internal Energy is multiple times lower than the work done by the system or The WORK OUTPUT is multiple times higher than the WORK INPUT I. A 15 ball billiard pool to be strike by white mother ball. F = 30lbs (White Mother Ball); D = 3ft (Distance from the white mother ball to the first ball to strike); W = Work, F = force; D = Distance The mother ball to strike the 15 ball is the work input The first collision is explosion followed by increase in force and travelled distance by individual ball followed again a series of collisions. The mother ball transferred the force to the group of 15ball. The momentum is conserved to the group of 15 while the explosion increases to 15 individual ball. The kinetic energy was absorbed by the group of 15ball. The explosion increases rapidly multiplied to 15ball individual. SOLVE FOR WORK INPUT W = F X D; W = 30lbs x 3ft = 90Ft.lbs SOLVE FOR WORK OUTPUT W = F X D; W = 30lbs x 3ft = 90ft.lbs X 15ball = 1,350 ft-lbs. II. For more heat energy the ball to replace with steel ball and steel side board. After strike are explosions of 15 balls. The explosion increases the group energy into individual 15. The work output higher than work input followed by series of collisions that produces more heat more work output, more sound energy more work output, more travelling distance more work output. III. To get even more energy output: Put additional two group of 6balls in triangular shape to be placed somewhere at the back of 15balls at least 4inches apart from the sidewall and back wall. A total of 15balls + 6balls + 6balls = 21balls. The explosion creates collisions after collisions increasing the energy output. The Internal Energy in I, II, III are the same however, after explosion the work done increasing 15 times the Internal Energy. That principle can use to make free energy machine. Thank you. Abel Urbina Abel Urbina Free Energy Super Machine
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Very interesting but.....what exactly is the second law of thermodynamics?
States that hot objects cannot absorbed energy from the surrounding but it only releases its own energy
it's the one that comes after the first law
The second law of Thermodynamics is that: Any process in nature occurs in a certain direction only.
This does not condemn the first law of energy conservation.
We are in league lol
@@MA-qz1sd 😂🤣🤣😂
Thank you for clarifying this! I had a hard time understanding how to use 2nd law formulas but now I can confidently apply them. You sir are the reason why I will pass my final this monday!
Did you pass?
@@Football_Eyes passed and graduated college
One of the greatest things I learned was to ask the prof a question once, keep my mouth shut if I didn’t understand, then look it up on RUclips later by a competent teacher.
I am very pleased with the writing and structure in explaining the concept. Sometimes hard things to understand are just not presented right. 👍
As a mechanical engineering student I find this vid very helpful! thanks again LearnEngineering, and the video editing wasn’t half bad ;)
You call this presentation "a minimum ues of mathematics"? You're dreaming. This is a highly technical explanation and is for people who already understand the second law.
I agree that saying “minimum use of mathematics” is pretty misleading, and it’s probably best used as a review for students. BUT i found this video very useful in completing my understanding of the second law rather than reinforcing concepts i already understood
During this entire video the law is never stated.
They provide multiple formulations
But it is still isn't explicitly stated.
Thank you for that.
#Entropy for a closed system ( like the universe ) , is always increasing .
#A self-occurring process, the entropy in the final state is greater than the entropy in the initial state.
#Heat is transferred from a body with a higher temperature to a body with a lower temperature.
The substance goes from higher concentration to lower concentration .
To do a work we need a delta ( difference in heat , or in substance concentration ) ; second law of therm-dynamics kills delta . *Life is struggle with second law of thermo-dynamics .*
It is the one who wins in the end .
Wow simply mind blown!!! I've seen this before in high school and never really got the idea behind of Gibbs free energy, thanks a lot
Free energy! Really?
including the clausius inequality? my high school could never
@@4001Jester im in high school right now, we did Gibbs free energy but not the Clausius inequality haha
@@puddleduck1405 we did pythagoras and pi r ^2 at high school
We will use no math here. Proceds to use only math
he actually said no *complicated* maths, oh wait... 5:05
both wrong.. he saaid minimum use of mathematics.. i stiill did not understand,, and frustrated me bringing the universe into it,, as it that was simple
I guess his definition of complicated isnt the same as yours lol
@@tijerinaivan Actually by universe, it doesn't mean we are talking about the entire cosmos including the galaxies and space. It's just used for the 'system' and 'surroundings' together.
And that is why entropy change of the "universe" is the sum of the change in entropy of the system and that of surroundings.
I couldn't understand entropy in whole semester and this dude explain me in 7 mins 😊😊
For the calculations on 5:00
Case 1: When Q=+10 JQ=+10J
This means 10 joules of heat are added to the system (the coffee).
For the system (the coffee at 45°C or 318 K):
ΔSsystem=10 J45°C+273=10318=+0.0314 J/K
ΔSsystem=45°C+27310J=31810=+0.0314J/K
For the surroundings (at 25°C or 298 K), the system is losing 10 J of heat, so we have Q=−10 JQ=−10J for the surroundings:
ΔSsurr=−10 J25°C+273=−10298=−0.0336 J/K
ΔSsurr=25°C+273−10J=298−10=−0.0336J/K
Now, the total entropy change for the universe is:
ΔSuniv=ΔSsystem+ΔSsurr
ΔSuniv=ΔSsystem+ΔSsurr
ΔSuniv=+0.0314 J/K+(−0.0336 J/K)=−0.00211 J/K
ΔSuniv=+0.0314J/K+(−0.0336J/K)=−0.00211J/K
So, the total entropy change is negative when 10 J is added to the system.
Case 2: When Q=−10 JQ=−10J
This means 10 joules of heat are removed from the system.
For the system (the coffee at 45°C or 318 K):
ΔSsystem=−10 J318=−0.0314 J/K
ΔSsystem=318−10J=−0.0314J/K
For the surroundings (at 25°C or 298 K), the system is losing 10 J of heat, but the surroundings are gaining 10 J, so Q=+10 JQ=+10J for the surroundings:
ΔSsurr=10 J298=+0.0336 J/K
ΔSsurr=29810J=+0.0336J/K
Now, the total entropy change for the universe is:
ΔSuniv=ΔSsystem+ΔSsurr
ΔSuniv=ΔSsystem+ΔSsurr
ΔSuniv=−0.0314 J/K+(+0.0336 J/K)=+0.00211 J/K
ΔSuniv=−0.0314J/K+(+0.0336J/K)=+0.00211J/K
Thankyou!
Everything was going well until he went entropy equation mode.
haha IK right
@@007adulrekha3 jai hind 🇮🇳🇮🇳🇮🇳
Ik haha lol but its pretty helpful tho
I dont like entropy but its making it usefull
This video is very good if you're an engineering student trying to solve entropy problems. Philosophically understanding it though, not so much. The 2nd Law just states that entropy or the disorder of a system tends to increase with time. Fundamentally it just means there are far more solutions where the result is a mess than an orderly one.
Think about a game of pool. Originally the balls are nice and orderly, but once things start moving, the balls end up all over the place. Now imagine trillions of particles doing the same thing. It is possible for entropy to decrease spontaneously but the chance of that occurring is practically impossible.
This law is not so much a product of physics (like F=ma or energy conservation) but of statistics. It's an emergent property that comes about because there are far more states where a system is disorderly than orderly.
To get even more philosophical, there is no ORDERLY or NON-ORDERLY in the universe. It is there only in our minds. The pool balls are orderly only for a person who knows what pool is. For an alien from a planet where balls are prohibited, that particular arrangement would be just as disorderly as anything else.
So now our second law's statement changes from a "ORDER ---> DISORDER" process to "SOME RANDOM STATE ----> SOME OTHER RANDOM STATE". It simply states that one state will move to some other state with time. If we cannot model the system exactly, after a time we will not be able to predict what that end state would be. So we end up with a lot of possible end states.
So at the end what the second law says is "as time goes on states change, you can't expect things to stay the same. When more time passes, you will become less and less likely to predict what would happen".
So the simplest statement of the second law is "time passes. things happen"
True. Unfortunately though the 2nd law is wrong in the sense that it is dependent on the boundedness of the observer who’s looking at the system.
You can imagine the space of states tending towards an increase in entropy statistically in such examples (particles in a box) because the system takes the states-space to always be more (have more degrees of freedom) than the number of particles themselves.
For example. You have 10 2dimensional particles, on a 10x10 grid, then there will always be an exponentially higher number of possible states the particles can be in and most of those states will be random in their distribution. The underlying state-space however is not in equilibrium, in fact it is highly ordered. You can imagine that if you interpreted each 2d particle as a black pixel(1) and every pixel that isn’t a particle as a white pixel(0) then the total system would be 000001000000000000100000….and so on. This is a highly homogenous distribution and *not* random.
The 2nd law is therefor an artifact of how the observer parses the system…where if the observer could resolve the whole statespace they wouldn’t see an increase in entropy it would in fact never change…where as when you parse the system where you lose information it will appear that the 2nd law is true.
It’s like ignoring the air molecules in a double pendulum experiment. Of course the 2body system will appear chaotic because one is simply ignoring and not taking into account the actual components of the system (air molecules).
Cheers,
a very perfect explanation for the physics behind the law, i listen to the video 3 or 5 times and finally I can say that now I understand the second law of thermodynamics
One of the finest video I have ever seen on this topic. Nice explanation.
“with a minimum use of mathematics”
*defines 2nd law with a line integral*
My guy this isn’t lego building you need math for engineering.
😂😂
@@vahagnyengibaryan4253 😂😂😂😂😂😂
I knew more before I watched the video
Wow you’re a genius!
I have no clue what this video was talking about
Now you know less.😂
we all do tho its mean we understand less
Maybe that is entropy?
"you need not to worry about what is happening in the surroundings" … but (T) in the Gips equation is the surrounding temperature !!
I thought I was confused before. Now I am definitely confused
So what I understood from all this is that energy always flows from "high to low", never the other way. Like water down a mountain. So any closed system that has any amount of entropy will always want to flow to 0. Any open system into which outside energy can be added will have entropy increase until that extra added energy is supplied no more, like a melting glacier adding water to a river, and once again it will go from "high to low" until we get an all stop at 0 entropy. All the water from the mountain has flowed. Or something like that.
The way you described it just sounds like only ‘ loss of energy’ to me and it doesn’t seem applicable to these laws
Thank you for using as little math as possible,.... I may have gotten lost if you would have used nothing but math. Sure glad THAT didn't happen,... *: )*
Sarcastic
Never knew, now I do :) Thank you Learn Engineering!
Excellent instructional video that allows to approach an abstract theme with the minimum of mathematics. Concerning physical phenomena, it is better to "feel" them before handling them with maths. Thanks a lot
Brilliant channel. Lots to learn. Kudos to the team.
Comments make me feel sad for the creator, he did a great job.
u made me more confused more than ever. thanks
best video for understanding the second law wonderful explanation man!
Thank you very much sir for such a crystal clear explanation about second law and entropy. A thanks from deep of my heart. 😊😊😊😊😊
Wow....sir ...i was just waiting for this animation video....i m very happy.....and a lot of bless to u for helping engineering students
In simple terms: 1st law = total existing energy remains the same even with conversions to different states of matter.
2nd law = Useful energy (or efficiency of work) decreases with each transformation due to heat loss and entropy in general.
For example, think of coal burning to heat water to produce steam to turn a turbine to generate electricity. Typically only 30-50% of the chemical potential energy stored in coal can be used to create electricity due to conversion losses at each step of the process.
i cant understand this in the video,,,,,but i understood by ur comment,,, thanks
Best explanation for me so far
Thankyou a thousand...... I'm suffering so much to understand this. Now I have a clear picture on entropy and the whole law. Please do a video on exergy. 💯💯👏🙏🙏
Thank you for your detailed explanation. After watching no.of times now I got an idea about second law
I take comfort in the 2nd law of thermodynamics knowing that all natural processes are irreversible, and that all things continue to move forward.
Joe Pera
From first law of thermodynamics we know that the total energy of the universe remains conserved that is the sum of the energy in in system and surrounding before and after the reaction is conserved but a question should arise in our mind that what is the direction of this flow of energy is it flowing from the system to surrounding or the energy is flowing from the surrounding to system so this direction is given by the second law of thermodynamics.
It's a mathematical analogy
But in simple words you can understand it as if gibbs free energy of a reaction is less than 0 the reaction is spontaneous that is it does not need any external energy source that is there is no flow of energy from surrounding to the system so we can conclude that the energy is flowing from system to the surrounding
Many misunderstandings in understanding the problems of life and evolution from the standpoint of physics and physical chemistry are typically associated with misconceptions in understanding entropy. The term "entropy" coined Rudolf Clausius. According to his model of the world (universe), he presented a statement: "The energy of the world is constant. The entropy of the world tends to the maximum". Later this statement was chosen by JW Gibbs as an epigraph to the paper "On the Equilibrium of Heterogeneous Substances". These scientists have given this statement in relation to their model of the universe. This model corresponds to a simple isolated system of ideal gas, i.e. isolated system of ideal gas, energy and volume of this system are constant and in which only the work of expansion is performed. Entropy of such a system can only increase!
It should be noted that when we say on ideal model, which would correspond to the real universe, it would be necessary to accept the unreal assumption that any form of energy real universe will be transformed into thermal energy. Only in this case, also under additional unrealistic assumptions, the real universe "would turn" into the model of ideal system of Clausius - Gibbs.
However, lovers of science have applied representations on simple systems to systems of other types, in which the interactions takes place between particles of different nature (interactions of molecules or other objects of different hierarchies) and to systems which interact with the environment. Some scientists, who are not professionals in the relevant fields of knowledge, have not escaped such errors. This has led to unimaginable confusion. This has slowed down the development of science, more than on a century. There are thousands of publications in scientific journals and popular literature containing marked misunderstandings. To these were added incorrect ideas on the negentropy and on the dissipative structures in the living world, and the false identification of "the information entropy" with the thermodynamic entropy.
The origin of life and its evolution can be easily explained from the standpoint of hierarchical near equilibrium thermodynamics of complex dynamic systems. This thermodynamics is established on a solid foundation of equilibrium thermodynamics - thermodynamics of Rudolf Clausius, JW Gibbs and other great scientists.
lol im dumb
I am 15 years old still watching this videos because I love engineering . And practicing to be engineer .
Keep it up good job😄
Aryan Gaikwad mechanical engineering mat lena
Good on you mate! Wish I had my priorities as straight when I was your age. I would recommend EE btw, best mix of pure physics, engineering and compsci out of the major disciplines. It's ultimately up to you tho, good luck!
+mofasa2 thx bro 😊
+Navneet Yadav 😁 I like computers more so I will go for software engineering but also like to learn new thing no matter whether it is mechanical 😊
Gyan jaha se milta hai battor lo👍
Good for the basics
Best explanation of entropy and Gibbs Free Energy that I’ve ever seen!
Wow amazing thank u now I got a clear idea why shall we study about entropy and especially how can we use it
Really appreciative
Good one Sir. U r examples were awesome.
The statements of the second law you crossed out are in fact the most useful for an engineer as they allow to develop intuition about the underlying physics. Formulae are an elegant way of stating laws of physics in the language of mathematics but that is not necessarily useful for understanding every day technical problems. The same applies to the abstract idea of entropy.
I think it’s stated that way in the sense of how some learn subjects! Some can’t apply ‘ intuition’ and ‘ abstract thought’ to math like
Others can! That’s definitely how I understand math! If you try and tell me to just learn numbers I simply can not lol
Excellent explanation, thanks.
1:37 states 2nd law is related to the direction of chemical processes while first law depicts the law of conservation of energy
2:45 states mathematical eqn. for 2nd law that total Entropy of an isolated system can never decrease
Great video man, dunno why people here are complaining. Its a 7min supplementary youtube vid, not supposed to act as a replacement for the textbooks
English subtitles stop at 3:16. Please fix it! English is not my main language and that helps a lot to understand. Thanks.
Nice explanation with best animation.
We also use these pumps in Iran, and our company specializes in repairs, winding and turning parts of these pumps, and we have been working in this field for 40 years.
The second law states that if the physical process is irreversible, the combined entropy of the system and the environment must increase. The final entropy must be greater than the initial entropy for an irreversible process: Sf > Si (irreversible process)
Great video. Thought I understood LT2 but this is great insight.
Dear Sabin + your esteemed audience,
First of all, many sincere thanks for your collective efforts!
"The "Second Law of Thermodynamics" is a fundamental law of nature, undeniably one of the most valuable discoveries of mankind. However, this law is slightly confusing for most engineers or students. The main reason for this is that it contains so many complex terms and there are many ways to phrase this second law, but most importantly the majority does not understand what the applications of this law are. In this video we will provide a real physical insight into this law with a minimal use of mathematics".
...Sounds terrific, but looks to be not for an average mind... Even big scientific research workers' brains had and still have to stumble herewith...
Moreover, your report demonstrates the meanwhile widespread Operationalism (unwillingness to enter important details) easily muddled-up in the audience with the 'engineering rigour'...
Hence, some kind of a clarification ought to be urgently necessary!
So, captain, AHOY!
A. There is ONLY ONE BASIC, fundamental Energy Conservation and Transformation Law. It is definitely unique and conceptually indivisible delivering two logically joint concepts - these are Energy Conservation - and Energy Transformation. Still, a more-then-100-years-old conceptual failure has brought us to two separate thermodynamic laws - but this has nothing in common with the actual physics. To come back, they have coined two more fake thermodynamic laws, employed the Probability Theory + Mathematical Statistics, and this has helped formulate the Quantum Mechanics, which is thus a basically metaphysical conceptual construction - and, hence, ought to be only restrictedly fruitful.
B. By dividing the basically indivisible law, you are touching Combinatorics, you are touching Probability Theory, you are even stepping back to Thermodynamics for a while, but...
You are NOT answering the poser: WHAT IS ENTROPY, sorry!
1. In the formula S = kB * ln(Ω) you do imply, Ω means not a "Huge Number of Microstates", not "Probability", which numerically ranges between [0,1], not even "Wavefunction", which ought to be a purely metaphysical notion, as it is... In effect, Ω ought to be a simplistic algebraic function of Lord Kelvin's Absolute Temperature. This result has been published 100 years ago in JACS.
2. WHAT-ENTROPY-IS-poser has been answered not by Clausius, not by Boltzmann, etc., but by Goethe, who has introduced Mephistopheles, the philosophical embodiment of ENTROPY.
3. Newton did basically know WHAT ENTROPY IS - A Counteraction.
4. That Counteractions do not grow to infinity with the growing Actions, but MUST reach their MAXIMUM values, is the result by Nicky Carnot, which has been formalized by Clausius...
5. In effect, J. W. Gibbs Free Energy formula:
(ΔG = U + pV - TS, .i.e.,
ΔG = H - TS
, where
U is the internal energy (SI unit: joule),
p is pressure (SI unit: pascal),
V is volume (SI unit: m3 = m*m*m),
T is the temperature (SI unit: kelvin),
S is the entropy (SI unit: joule per kelvin),
H is the enthalpy (SI unit: joule))
renders implicit the interplay among ALL the relevant Actions (the Enthalpic term) and ALL the pertinent Counteractions (the Entropic term).
6. The standard approach you are reporting about is OK for the implicit Enthalpy-Entropy picture, employing it for studying reaction mechanism details is likewise eating soup with a fork.🧐
My brain hurts after reading this.
@@ravenking2458 I dare to assure you that this is a definitely good news for you.
Every birth is connected with some painful feeling...
Many sincere thanks for your taking time to respond!
Keep up the good work this really helps to get a better idea of thermodynamics even if you have studied it before
Many discrepancies in understanding the problems of life and evolution from the standpoint of physics and physical chemistry are typically associated with misconceptions in understanding entropy [4-7]. The term "entropy" was coined by Rudolf Clausius. Following his model of the world (universe), he stated: "The energy of the world is constant. The entropy of the world tends to the maximum". Later this statement was chosen by J.W. Gibbs as an epigraph to his paper "On the Equilibrium of Heterogeneous Substances". These scientists have given this statement in relation to their model of the universe. This model corresponds to a simple isolated system of ideal gas, i.e., an isolated system of ideal gas, in which the energy and volume are constant and only the work of expansion is performed. The entropy of such a system can only increase! It should be noted that when we speak about the ideal model that would correspond to the real universe, it would be necessary to accept the unreal assumption that any form of energy in the real universe will be transformed into thermal energy. Only in this case, and under additional unrealistic assumptions, the real universe "would turn" into the Clausius-Gibbs model of the ideal system. However, science amateurs applied representations of simple systems to systems of other types, in which interactions takes place between particles of different nature (interactions of molecules or other objects of different hierarchies) and to systems which interact with the environment. Some scientists, who are not professionals in the relevant fields of knowledge, did not escape such errors. This led to unimaginable confusion and slowed down the development of science for more than a century. There are thousands of publications in scientific journals and popular literature containing marked misunderstandings. To these were added incorrect ideas on negentropy and on dissipative structures in the living world and the false identification of "the information entropy" with the thermodynamic entropy.
The origin of life and its evolution can be easily explained from the standpoint of hierarchical near-equilibrium thermodynamics of complex dynamic systems. This thermodynamics is established on a solid foundation of equilibrium thermodynamics, thermodynamics of R. Clausius, J.W. Gibbs, and other great scientists.
www.arcjournals.org/pdfs/ijrsb/v5-i3/2.pdf
thank you much for posting this.
Thank you so much. It was much much easier to understand!
After this video I realised that all this physics is to prove common sense by mathematics. Good video.
'My name is Ozymandias, king of kings:
Look on my works, ye Mighty, and despair!'
Nothing beside remains. Round the decay
Of that colossal wreck, boundless and bare
The lone and level sands stretch far away.
Dhnayvad brha nice video every thing is good 🙏🏻👌
The reason why time travel isn’t possible
For a human living being!
The body or cup would burst
They’d die
So true.
Do u have any good videos talking about it?
The captions and the transcription died at 3:14. Being deaf I could not follow the rest of the video.
I really wanted to see this. The 2nd Law is important for a whole range of reasons and it appears to be widely misunderstood. I am looking at all explanations to help my understanding of it.
Any chance you might fix the caption/transcripts?
Its a great simple explanation.👍
I shall have to look at this video again. Lots of information to get my head around. I liked the info about Entropy .I did not know that before seeing this video.
Excellent work done dude thanks for this free knowledge transfer
Well,only if ∆S is negative!
Since an entropy is energy/temperature ; SO :
How can we relate blowing a ballon to the entropy ? !
Or falling of a mass to the entropy ? !
3:25 entropy is heat transfer effect PLUS disorder
deflating a balloon increases the disorder of air particles
not totally sure what to say about falling mass
You're doing a great job
To be precise in the bottle where there are the two chemicals it should be used Helmholtz energy (A) since it is an isocore instead of in isobar process
Good with practical examples
👏nice explanation
I can see how the Entropy is increased once a falling object crashes on the floor, but the entropy shouldn't increase while it is falling (at least in vacuum). So why is it falling then? I don't think entropy is the answer.
Learnt more from the comments than the video but thanks for the video
Umm as a complete illiterate in thermodynamics I am afriad that this video was not enough😃 I do get the gist bit I think that it was too fast for me or that some part of "Noob you need to know this first" was missing. Could you for the future also list some prerequisites like PBS Space used to have?
It's not a big deal if it's too fast for you. Videos like this are more about a payload of information. Its purpose is to give you content to muse over, not that you should just understand and remember everything in real-time.
Jakubrigo I would say that these videos are more at an intermediate level where you have basic knowledge of the fundamentals.
Awesome and very knowledgeable video
Thankyou for the explanation 🧡✨
great channel .I like very much this channel because I like scientific explaining ......
Thank you so much. Very clear and simple.
This video is very insightful
GREAT VIDEO. Can you do a video on how radars work?
simplicity is the secret of genius.
Thank you for the education on Thermodynamics. Roland (inventor)
Very well explained... Now i completely understand the 2nd law of motion.
Love the animation.
I got this in my recommended for some reason but it's very interesting, all I got from this is that energy moves in a certain direction but that's it
Best book to this problem: Structural Dynamics Of Flow by Leslie Claret
I appreciate this reference immensely
well explained! good work.
I think after two years of study I only understood dynothernamics. In about two more decades I should get this thermodynamics thing under control.
Wow thanks team it helped me alot
put more videos related to mechanical. it is very useful for many people. thank you
Durai Raj you can check mechanical video on our channel....
If this was a way to explain entropy to a newbie, it was - and is - a spectacular failure. I am going hunting for other, better-explained videos on the topic.
May I request to please correct me if I am wrong.
Wikipedia meaning of explosion: An explosion is a rapid increase in volume and release of energy in an extreme manner
The applications of explosion in the system the principle of Thermodynamics fail.
The Internal Energy is multiple times lower than the work done by the system or The WORK OUTPUT is multiple times higher than the WORK INPUT
I. A 15 ball billiard pool to be strike by white mother ball.
F = 30lbs (White Mother Ball); D = 3ft (Distance from the white mother ball to the first ball to strike); W = Work, F = force; D = Distance
The mother ball to strike the 15 ball is the work input
The first collision is explosion followed by increase in force and travelled distance by individual ball followed again a series of collisions.
The mother ball transferred the force to the group of 15ball. The momentum is conserved to the group of 15 while the explosion increases to 15 individual ball.
The kinetic energy was absorbed by the group of 15ball. The explosion increases rapidly multiplied to 15ball individual.
SOLVE FOR WORK INPUT
W = F X D; W = 30lbs x 3ft = 90Ft.lbs
SOLVE FOR WORK OUTPUT
W = F X D; W = 30lbs x 3ft = 90ft.lbs X 15ball = 1,350 ft-lbs.
II. For more heat energy the ball to replace with steel ball and steel side board. After strike are explosions of 15 balls. The explosion increases the group energy into individual 15. The work output higher than work input followed by series of collisions that produces more heat more work output, more sound energy more work output, more travelling distance more work output.
III. To get even more energy output: Put additional two group of 6balls in triangular shape to be placed somewhere at the back of 15balls at least 4inches apart from the sidewall and back wall. A total of 15balls + 6balls + 6balls = 21balls. The explosion creates collisions after collisions increasing the energy output.
The Internal Energy in I, II, III are the same however, after explosion the work done increasing 15 times the Internal Energy. That principle can use to make free energy machine.
Thank you.
Abel Urbina Abel Urbina Free Energy Super Machine
Awesome... Love your videos guys...
This video is awesome , only if you know a bit about thermodynamics
I must say you a great knowledge
Very well explained 👍
That's the beauty of thermodynamics. Mechanical engineering know that
I love this channel its just awesome..
thanks for the hard work
I can spend 5 min in your channel rather than spending 1 Year in the university 👍🏻 Excellent explication.
Everybody is Gangsta until the equation comes .. 😂
Tank you for this video
Great vid! Is the Temperature in the expression for Gibbs free energy that of the surrounding?
Amazing.. thanks
Excellent!!!