I just wanna say that paying my university fees is losing money. I am passing the exam by your explanation. In reality, I see all the students in the uni watching you before any exam. THANK YOU and keep on
ma man helped me revise a whole thermodynamics course only with him, im very blessed to say that even without a physical teacher.. in my heart the organic chemistry tutor is in fact my teacher!
Thank you so much I’ve learnt a lot so far on this channel and this is the first time I’m typing a comment. I was taught to convert my shc to 4.184 Buh you never did. Why?
5:52, i think you mean the *final* temp is 50 not avg. I could be wrong, but you referred to it as final temp and you proceeded to find the actual avg temps later in your work.
at 11:00 and forward, you used 4184 for your heat capacity yet the units are J/Kg*C. How are you able to use 4184 in the equation that has the temperatures in Kelvin?
The elementary mercury, Hg, is a silvery liquid atom at room temperature. The normal freezing point of mercury is -36.9 ºC, and its molar enthalpy of fusion is ∆Hfus = 2.29 kJ/mol. What is the entropy change (∆S ) of the system when 50.0 g of Hg (l) freezes at the normal freezing point?
In the second question, the 2nd way to solve , you don’t convert the specific heat unit from celsius to kelvin ?? Why you use the same value 4184 j/kgc ??
Latent heat of fusion is the heat required for a substance to change from a solid to liquid (and vice versa). Enthalpy just means the content of heat and work a substance have.
Depends on the accuracy you are aiming for. dissolved metals increase the entropy, so you would have to take that into consideration too. (chem.libretexts.org/Bookshelves/General_Chemistry/Book%3A_Chem1_(Lower)/08%3A_Solutions/8.02%3A_Thermodynamics_of_Solutions) The formula works on most liquids, within some degree of accuracy.
@@azieraazram5279 15:00 discuss ur point with ur friend in Totural n try to confess him, wut i care about my brilliant students is to use the tequniqes basic n advance of science especially teqniques of research about specific subject between million of books in science library is he or she got wrong result no problem the J E W enistein made wrong theory all today world play by radioactive elemnts as sand, n me n bohr suffer from it, if u desturb my chairman office again especially during my break time busy with ur professors the German femals doctors in my office break time, i will charge u to buy my breakfast next day punishment varies to cleaning ur lectureroom & buying me juice or markers So do not knock door of Prof.Dr. Lennart office cuz he is always firing, i am busy with my life project (The starship) while my speciality is far away from physics but i used to play this Science game since i made my baby underwear dirty
@@azieraazram5279 I am not American professors I am German scientist i care about the core, American students r artist of cheating they read for exam once they award the degree stop reading, n the college accept any 1 who can afford this why no new services or real product since ww2
Physics Video Lessons: www.video-tutor.net/physics.html
I just wanna say that paying my university fees is losing money. I am passing the exam by your explanation. In reality, I see all the students in the uni watching you before any exam. THANK YOU and keep on
Totally agree
extremly agree
nah you pay for the degree not for the knowledge
ma man helped me revise a whole thermodynamics course only with him, im very blessed to say that even without a physical teacher.. in my heart the organic chemistry tutor is in fact my teacher!
I have yet to study something without ending up watching your videos, they are just too easy to understand
Thank you so much for this, you're the reason I haven't failed college yet
So real
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you are amazing and a life saver
Thank you so much I’ve learnt a lot so far on this channel and this is the first time I’m typing a comment. I was taught to convert my shc to 4.184 Buh you never did. Why?
what a legend
U r pass next failur student in my class
Really nice ...im satisfied
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Thank you for that 😁
5:52, i think you mean the *final* temp is 50 not avg. I could be wrong, but you referred to it as final temp and you proceeded to find the actual avg temps later in your work.
To find final temp. he find average temperature or you can say mean.. I think if I'm not wrong
Average of the temperature of the cold water and hot water IS the FINAL temperature
Keep it up brother...
at 11:00 and forward, you used 4184 for your heat capacity yet the units are J/Kg*C. How are you able to use 4184 in the equation that has the temperatures in Kelvin?
For the mixture problem would the process of finding final temperature be different if the mass of the two objects were different?
I love you very muchbro!
The elementary mercury, Hg, is a silvery liquid atom at room temperature. The normal freezing point of mercury is -36.9 ºC, and its molar enthalpy of fusion is ∆Hfus = 2.29 kJ/mol. What is the entropy change (∆S ) of the system when 50.0 g of Hg (l) freezes at the normal freezing point?
Very useful!
Yes it’s
thank u sir!
Amazing ! THANK YOU!
at 2:17 we were taught to take moles, not mass. I have been doing it such. Someone help out in which is right?
both are correct just depends on the information given and what you do with it
You can take moles if the heat capacity is molar. If specific heat capacity is given, you take mass.
Thank you so muchhhhhhhhhhhhhhhh !
In the second question, the 2nd way to solve , you don’t convert the specific heat unit from celsius to kelvin ?? Why you use the same value 4184 j/kgc ??
Hi guys, how do I post a question to this amazing organic chemistry tutor?
Reinhold Katti Amushelelo ask kindly
Did he say what the final T was for problem 3?
i have a quesion if given condition is P = 1.5atm , T = 373K then can we calculate entropy of air?..
idol kita
Which textbook is this?
Let's go to the alps
whats the difference between latent heat of fusion and entalpy h?
Latent heat of fusion is the heat required for a substance to change from a solid to liquid (and vice versa). Enthalpy just means the content of heat and work a substance have.
How are you getting the 50
i don't think i am going to make in an hour so i'm jus going to leave a comment right here
Great
DeltaS= (Q/T avg) + (Q/T avg)
Is this formula applicable only for water/water mixture?
What about metal in water?
Depends on the accuracy you are aiming for. dissolved metals increase the entropy, so you would have to take that into consideration too. (chem.libretexts.org/Bookshelves/General_Chemistry/Book%3A_Chem1_(Lower)/08%3A_Solutions/8.02%3A_Thermodynamics_of_Solutions)
The formula works on most liquids, within some degree of accuracy.
❤❤
Pass
was it the formula to find final temperature of mixture should be (m1xT1) + (m2xT2) / m1+m2
@@azieraazram5279 15:00 discuss ur point with ur friend in Totural n try to confess him, wut i care about my brilliant students is to use the tequniqes basic n advance of science especially teqniques of research about specific subject between million of books in science library is he or she got wrong result no problem the J E W enistein made wrong theory all today world play by radioactive elemnts as sand, n me n bohr suffer from it, if u desturb my chairman office again especially during my break time busy with ur professors the German femals doctors in my office break time, i will charge u to buy my breakfast next day punishment varies to cleaning ur lectureroom & buying me juice or markers So do not knock door of Prof.Dr. Lennart office cuz he is always firing, i am busy with my life project (The starship) while my speciality is far away from physics but i used to play this Science game since i made my baby underwear dirty
@@azieraazram5279 I am not American professors I am German scientist i care about the core, American students r artist of cheating they read for exam once they award the degree stop reading, n the college accept any 1 who can afford this why no new services or real product since ww2
krasavchik
why does this sound like mark wahlberg
WAY TO QUIET!, good video though
Stephen Mancuso I noticed no issues, with my volume at only 50%....