I don't know how students before the year 2016 used to survive varsity life without this guy around, but all I know is that i learned more from this channel in class.
It's mind boggling how some great people can make chemistry so simple and straightforward. And meanwhile we have these ginormous textbooks and professors that use all kinds of symbols, texts calculations and more symbols from like Area 51 to explain 1st year chemistry. You can tell right away who're the good teachers and who're the bad ones.
I’m here because the past 2 weeks my physics “teacher” has literally just written equation after equation with 0 explanation or conceptual examples. 5 minutes of this video on 2x and I’m ready for the test today lol
I have a chemistry exam this Tuesday on Thermochemistry including a problem on Hess' Law. Your tutorial is exactly what I needed in order to successfully solve the practice exam problems. Thanks so much!
These videos are sent from heaven. I’m a 34 year old premed nurse taking intercession chem and I literally can’t keep up. I watch these videos after school every day
Would just like to say thank you. I was gone this day, and since this is review, our AP chem teacher is going over our thermochem unit in like 3 days. Not just this video, but your channel is a lifesaver, and I feel so confident for my test tomorrow. Thank you so much for saving my GPA and letting me love chem!!!!!
dude with this Quarintine going on my classes are online so I cannot see the tutors. I have heard this 1000000 times but when you say it, i get it. Thank you so much !!!!!!!
I had given up on understanding Hess's Law until i watched this video. Thank you so much! You don't know how much you've helped me and many other students
Hi,I don't know if you will read my comment but thanks to you I've managed to survive and pass Chemistry. You go at a good pace and are very thorough, thank you so much. I've been subscribed for almost a year now too :)
I am in general chemistry with the lecture online and the lab on site. It has been tough because the methods my teacher uses leaves me seeking other sources (such as this one) to effectively learn chemistry. It has been time consuming and difficult with the text book being so wordy and not giving the work outs for the math involved. I have found tutoring and this channel to be the absolute most helpful ways to learn. I am so grateful that these videos are here to watch and replay to learn! Thank you so much!
I took extra paid classes to understadn thermodynamics.. I was not even able to understand the hess's law problems.. after only 15 min of this video.. i feel like i can create my own questions upon hess's law... You are a master.
Professor Organic Chemistry Tutor, thank you for a basic explanation of Hess Law and How to apply it to Enthalpy Change of reaction by finding the heat of summation of individual reactions in AP/General Chemistry. Although the practice problems are simple to follow and understand, I am still confused about this material. I will review Hess Law from top to bottom in order to understand this material. This is an error free video/lecture on RUclips TV with the Organic Chemistry Tutor.
Think of Hess’s law as having multiple reactions that you can either flip divide by a coefficient or multiply by a coefficient to get your desired reaction
I have my final CHEM 101 test tomorrow and this was the last concept I still couldn’t grasp. Thank you for making this video, it really is great that this channel has videos on whatever I need to learn.
This tutorial has been very helpful in my adventure in thermodynamics and especially Hess law problems. Thank you. Please continue such a good work. You are a light for many student a cross the globe.
Dude, your voice sounds so much like a Creepypasta voiceover channel I expected something scary to happen. Instead, this video was absolutely terrifying. Chilling. Haunting. Keep up the good work.
The story of my life 🤦♀️ I’m only taking chemistry just to get into a good uni course. And unfortunately I need 2 science courses I’m taking bio and chem ugh. I literally cannot comprehend this, I’m literally trying every single brain cell to listen to the teacher but my brain drifts away within 1 second… I think my brain understands concepts that are more worded like bio ughfhnefinceinwdni END IT NOW
Dobyou have a healthy diet? I used to have learning difficulties in primary school, but turned out I was just consuming too many sugary drinks and other junk that made it harder for me to focus. High school was way easier for me because of this. @@Iliekmelonz
Actually , the tutorial is amazing ans clear! I learned this in my chemistry lectures, but it was not clear for me. you have explained it well. Iam so happy to say it .
Im in chemistry AP (advance program) and i question myself everyday why i took ap. bu thank you for this video no I understand more about hess law. GOOD LUCH LUCK FOR MY CHAPTER EXAM
I not understand anything when I learn this in class but now I understand everything from this video 😍 thank you so muchh, you are the best teacher ever 👍
if you're more math oriented/have taken precalc, take a close look at this (and balancing equations, and redox, and so much other shit)...it's all linear algebra/matrix algebra/systems of linear equations. If you're good with matrices or want a more rigorous way to go about solving these, you can balance anything like this using matrices, row reduction, and finding the determinant. (figured that one out on my final by complete accident when I decided "fuck it". It worked.)
I have thermochemistry exams tomorrow so this is reallyyy a great help. I'm still in my first year computer engineering course and I feel overwhelmed, especially in chem, so this channel really helped me a lot. I hope 4 years from now, I've graduated from this course tho🤣
Everyone has said this already, but it's my turn. Thank you for helping us students around the world, using your own time to help a dumb boy like me. You are a good man v_V
I hv improved drastically in my chemistry and physics thanks to you ...now my colleagues Wer lyk hey wats ur secret and I was Lyk ORGANIC CHEMISTRY TUTOR😂😂 Thanks men🙏
Thank you! I understood this section of Hess law. Followed along with the practice and understood. There are some other problems in my topic that are with moles instead so I will probably have to do this another way. But I really appreciated it as I started from knowing nothing 😊
Thank you so muchhhh! I'm having problem with my modules for about 1 hour as it didn't even explain or show how the heck can we solvce the question. But glad that I watched this
An interesting thing that I've found with Hess' Law is that we can group each reaction into a Matrix instead of just stacking them on top of each other. For example: (17:20) [1] 2H2O -> 2H2 + O2, dH = +572 kJ [2] CO2 -> C + O2, dH = +394 kJ [3] 2C2H2 + 5O2 -> 4CO2 + 2H2O, dH = -2600 kJ --------------------------------------- [4] C2H2 -> 2C + H2 Can be rewritten as: H2 | +2 0 0 | | +1 | C | 0 +1 0 | [path] | +2 | C2H2 | 0 0 -2 | | -1 | Where each row represents a species not eliminated by rxn [4], each column in the matrix represents rxns [1-3], the final column represents the net coefficients in rxn [4], and the +/- signs each represents which side of the thermochemical equation a species is on (+ indicating it's a product, - indicating it's a reactant). The [path] signifies the factor which transforms a species' coefficient from that of matrix [rxn 1-3] into the net [rxn 4]. This is made easier by eliminating the species which are unnecessary, those being CO2, O2, and H2O. Now, as displayed above, it is simply a matter of taking the sum of the coefficients in each row, taking note of how they transform into the "net" column. H2 has a coefficient of 2, and is on the product side of the equation. It's "net" gives a coefficient of 1, also a product, and thus we can determine that the path will be (+1/2) . Doing the same for Carbon and Acetylene will likewise give factors of (+2) and (+1/2) respectively. Last but not least, we will multiply the dH values of each rxn by their path factor, add them all together, and get a final answer of -226 kJ. Hope that helps!
Thanks you so much. You have taught me so much chemistry. My chemistry teacher was absolutely uselsss. I'm definitely going to pay it forward somehow to someone else😭
Thermochemistry - Free Formula Sheet: bit.ly/3TP4U4u
Thermochemistry - Video Lessons: www.video-tutor.net/thermochemistry.html
i have learned more chemistry from this channel than my chemistry teacher
watch his ads bro or donate him this guy is legend
Funny then, that during the school shutdown, my chem teacher is making us watch this.
@@aidang7278 😂😂
Me too
me too this channel is very wonderful i love it
I don't know how students before the year 2016 used to survive varsity life without this guy around, but all I know is that i learned more from this channel in class.
It's mind boggling how some great people can make chemistry so simple and straightforward. And meanwhile we have these ginormous textbooks and professors that use all kinds of symbols, texts calculations and more symbols from like Area 51 to explain 1st year chemistry. You can tell right away who're the good teachers and who're the bad ones.
I’m here because the past 2 weeks my physics “teacher” has literally just written equation after equation with 0 explanation or conceptual examples. 5 minutes of this video on 2x and I’m ready for the test today lol
Mine is definitely bad
I did not understand hess's law problems until 20 min ago. Thank you.
Fax
that makes two of us
I never been so happy
You deserve to be on every students RUclips feed
I so much agree ✨
It's trippy how easy Chem is when you actually understand the material. Thanks for the help broski, keep up the good work
I have a chemistry exam this Tuesday on Thermochemistry including a problem on Hess' Law. Your tutorial is exactly what I needed in order to successfully solve the practice exam problems. Thanks so much!
LOL same here dude but a year later
how did your exam go? do you remember your score
@@ibtisamatiq9575 Same here, but another year later
@@hadieartiel1147 haha good luck
have one in about 12 hours lol
You explaining the rules and having the a+b+c examples really helped a lot, you just goated on another level.
The organic chemistry tutor, you are the hope of all high school and college students. Thank you
Veteran finally back in school, you're saving my life man. Cant thank you enough.
the best explainer ever.
u got 69 likes. Be proud !!
@@adlindkodra9910 not anymore lmao
These videos are sent from heaven. I’m a 34 year old premed nurse taking intercession chem and I literally can’t keep up. I watch these videos after school every day
Would just like to say thank you. I was gone this day, and since this is review, our AP chem teacher is going over our thermochem unit in like 3 days. Not just this video, but your channel is a lifesaver, and I feel so confident for my test tomorrow. Thank you so much for saving my GPA and letting me love chem!!!!!
dude with this Quarintine going on my classes are online so I cannot see the tutors. I have heard this 1000000 times but when you say it, i get it. Thank you so much !!!!!!!
I had given up on understanding Hess's Law until i watched this video. Thank you so much! You don't know how much you've helped me and many other students
Hi,I don't know if you will read my comment but thanks to you I've managed to survive and pass Chemistry. You go at a good pace and are very thorough, thank you so much. I've been subscribed for almost a year now too :)
I will forever be thankful to this man, bro u teached me 11th and 12th grade physics and still helping me now that I’m in college
I am in general chemistry with the lecture online and the lab on site. It has been tough because the methods my teacher uses leaves me seeking other sources (such as this one) to effectively learn chemistry. It has been time consuming and difficult with the text book being so wordy and not giving the work outs for the math involved. I have found tutoring and this channel to be the absolute most helpful ways to learn. I am so grateful that these videos are here to watch and replay to learn! Thank you so much!
I took extra paid classes to understadn thermodynamics.. I was not even able to understand the hess's law problems.. after only 15 min of this video.. i feel like i can create my own questions upon hess's law... You are a master.
The day u started ur RUclips channel is sincerely the best day for me😊
I actually have so much love for you. you make chemistry seem so much easier than what the teachers/textbooks show it to be
And suddenly this became the easiest thing. Thank you so much!
Professor Organic Chemistry Tutor, thank you for a basic explanation of Hess Law and How to apply it to Enthalpy Change of reaction by finding the heat of summation of individual reactions in AP/General Chemistry. Although the practice problems are simple to follow and understand, I am still confused about this material. I will review Hess Law from top to bottom in order to understand this material. This is an error free video/lecture on RUclips TV with the Organic Chemistry Tutor.
Think of Hess’s law as having multiple reactions that you can either flip divide by a coefficient or multiply by a coefficient to get your desired reaction
I have my final CHEM 101 test tomorrow and this was the last concept I still couldn’t grasp. Thank you for making this video, it really is great that this channel has videos on whatever I need to learn.
if you are watching these videos the day before the exam, it wont go well
❤ Now I understand Hess law to the fullest thank you tutor 🎉
This tutorial has been very helpful in my adventure in thermodynamics and especially Hess law problems. Thank you. Please continue such a good work. You are a light for many student a cross the globe.
Hi, i just learned more in this 20 mins video than i ever did in those daily 1hr lectures. THANK YOU!
Dude, your voice sounds so much like a Creepypasta voiceover channel I expected something scary to happen. Instead, this video was absolutely terrifying. Chilling. Haunting. Keep up the good work.
Thank you so much! You teach so much better than my instructor! I paused the video and did the problems, and I actually got the right answers!
watched 2 full ads because this man deserves it. Youre amazing!!
I would have but each ad has 2 parts and the second one was 18 mins lol
I hate chemistry with every fiber of my being
😂😂
The story of my life 🤦♀️ I’m only taking chemistry just to get into a good uni course. And unfortunately I need 2 science courses I’m taking bio and chem ugh. I literally cannot comprehend this, I’m literally trying every single brain cell to listen to the teacher but my brain drifts away within 1 second… I think my brain understands concepts that are more worded like bio ughfhnefinceinwdni END IT NOW
😂😂
Me too
Dobyou have a healthy diet? I used to have learning difficulties in primary school, but turned out I was just consuming too many sugary drinks and other junk that made it harder for me to focus. High school was way easier for me because of this. @@Iliekmelonz
Actually , the tutorial is amazing ans clear! I learned this in my chemistry lectures, but it was not clear for me. you have explained it well. Iam so happy to say it .
Im in chemistry AP (advance program) and i question myself everyday why i took ap. bu thank you for this video no I understand more about hess law. GOOD LUCH LUCK FOR MY CHAPTER EXAM
my teacher spend like tripple this time for me not to understand it. Organic chem tutor ur the GOAT fr
I not understand anything when I learn this in class but now I understand everything from this video 😍 thank you so muchh, you are the best teacher ever 👍
if you're more math oriented/have taken precalc, take a close look at this (and balancing equations, and redox, and so much other shit)...it's all linear algebra/matrix algebra/systems of linear equations. If you're good with matrices or want a more rigorous way to go about solving these, you can balance anything like this using matrices, row reduction, and finding the determinant.
(figured that one out on my final by complete accident when I decided "fuck it". It worked.)
Omg ty
going to try using matrices on the problem from 7:34
actually how would you use the values from 7:34 and out that Into a matriz
Never stop doing this, you are the man!
i have a thermo test on tuesday and this really helped thank you :)
No teacher could every teach me that this guy did that too in a very very easy way! Thanks ❤️
I have finals tomorrow for this complicated topic...
Pray for my survival🙏
Edit:slr I survive hahaha hooray! This is really helpful!✨ thanks✨
Shera Haya Kichin how did it go lol
Want dat Cadpat ur about 6 and a half months late.
@@wantdatcadpat44 Didn't survive
Yo how did it go??
how did it go?
My chemistry teacher doesn't explain this stuff very well so this video has made the entire class understand it that much more.
wow sir.. i FINALLY understood this topic. Loved the way you explained everything so easily. It was fun learning ! Thank you so much 😊
You are a saviour man, amazing explanation sir
He is one of the best human being to exist. May God bless him!
I have thermochemistry exams tomorrow so this is reallyyy a great help. I'm still in my first year computer engineering course and I feel overwhelmed, especially in chem, so this channel really helped me a lot. I hope 4 years from now, I've graduated from this course tho🤣
i missed part of my zoom meeting because of bad wifi and you helped me get back on track! tysm!!
Thank you for stating multiple examples..which have made me understand Hess' Law much better..
Good
You made it so easy for me to finally understand it! Thank you!
@theorganicchemist
Isn't DeltaH in the problem @6:15 the difference between the equations? Why the sum?
You are an excellent teacher! Students are lucky to have access to your lessons! Thank you
Everyone has said this already, but it's my turn. Thank you for helping us students around the world, using your own time to help a dumb boy like me. You are a good man v_V
You literally saved me with this video. I’m not even gonna lie, without this video, I would have failed chem
I hv improved drastically in my chemistry and physics thanks to you ...now my colleagues Wer lyk hey wats ur secret and I was Lyk
ORGANIC CHEMISTRY TUTOR😂😂 Thanks men🙏
Really thank you too much ... your way of explanation is too perfect👌❤
ive never understood this concept until this video, thank you so much you are the reason why I am able to ace chemistry!!
Very concise and easily understandable explanation of Hess' Law. Thank you.
May God bless you brother.. You help a lot of people...
thank you for blessing this earth with ur presence
Thanks for breaking it down so well, especially with the letters in the beginning.
You saved my life and I want to give you my thanks. I wish I found your channel before I took my midterm but acing my final will have to do
Thank you so much for your explanations. You're the best. May God bless you
Oh my goodness im crying i understood it thank u so much God bless u
ever since i watched ur phy's vid i keep on watching your vid for every topic tht we learn in college.. tq so much ❤️
My chemistry teacher is so bad at explaining stuff to us. Your literally the only reason I pass that class thank you.
Learning from this channel was so much easier than using snap revise.. i understood better and no more confusion
simple, to the point and beautifully explained .THANK YOU
only 15 min of this video made me comprehend the law problems.. I can create my own questions on it..
Thank you so much! You make an already hard class easier because you explain everything so well!
THANK YOU! I was totally spacing when my chemistry professor was going over this and this helped so much. I didnt realize it was so simple.
Your teachings are very easy to get the concept good job👍
I LOVE YOU THANKS FOR MAKING THIS 1000x MORE SIMPLE THAN HOW MY TEAcher EXPLAINS IT
Thank you very much. You helped me a lot and you are a great explainer. I have a test on this tomorrow ,and it really helped.
On 3:43 why is E on the product side? In equation 2 it is on the reactant. Im not getting it
I'm so grateful for your videos ... words can't even describe it.
I thought Hess law was the most complicated thing ever... Turns out it's very simple thanks to this genius.
I had no clue how to do this. Appreciate the conciseness!
Thank you! I understood this section of Hess law. Followed along with the practice and understood. There are some other problems in my topic that are with moles instead so I will probably have to do this another way. But I really appreciated it as I started from knowing nothing 😊
you are really helped me through g10 and 11 i never understood chemistry from my teachers but i did understand from you. thank you
Love you. It's very helpful for clearing concept for jee
Thank you for the powerful knowledge sir. Each time I watch your videos I learn something new.
very clear explanations on the Hess's law, this is exactly what i wanted. you are awesome
YOU EXPLAINED IT PERFECTLY THANK YOU
wow!!!! very clear and perfect chemistry lesson!
Your videos are such a great help, thank you!
I have a quiz tomorrow about this and I had no idea how to do this until i saw this video so thank you so much!
Thank you so much sir. I was finding it difficult to understand this but with your video I knw clearly understood
Thank you so much. This really help me for my chemistry quiz right this afternoon!
Someone needs to give this man a winning lottery ticket hes easier to understand than my lecture vids
The great description really helped me out! God Bless!
Thank you very much! You video really helps. I’m dealing with worse chemistry teacher. This really clarified the concept.
Thank you so muchhhh! I'm having problem with my modules for about 1 hour as it didn't even explain or show how the heck can we solvce the question. But glad that I watched this
You are literally so amazing! Thank you so much for making these videos!!
An interesting thing that I've found with Hess' Law is that we can group each reaction into a Matrix instead of just stacking them on top of each other.
For example: (17:20)
[1] 2H2O -> 2H2 + O2, dH = +572 kJ
[2] CO2 -> C + O2, dH = +394 kJ
[3] 2C2H2 + 5O2 -> 4CO2 + 2H2O, dH = -2600 kJ
---------------------------------------
[4] C2H2 -> 2C + H2
Can be rewritten as:
H2 | +2 0 0 | | +1 |
C | 0 +1 0 | [path] | +2 |
C2H2 | 0 0 -2 | | -1 |
Where each row represents a species not eliminated by rxn [4], each column in the matrix represents rxns [1-3], the final column represents the net coefficients in rxn [4], and the +/- signs each represents which side of the thermochemical equation a species is on (+ indicating it's a product, - indicating it's a reactant). The [path] signifies the factor which transforms a species' coefficient from that of matrix [rxn 1-3] into the net [rxn 4]. This is made easier by eliminating the species which are unnecessary, those being CO2, O2, and H2O. Now, as displayed above, it is simply a matter of taking the sum of the coefficients in each row, taking note of how they transform into the "net" column.
H2 has a coefficient of 2, and is on the product side of the equation. It's "net" gives a coefficient of 1, also a product, and thus we can determine that the path will be (+1/2) . Doing the same for Carbon and Acetylene will likewise give factors of (+2) and (+1/2) respectively.
Last but not least, we will multiply the dH values of each rxn by their path factor, add them all together, and get a final answer of -226 kJ.
Hope that helps!
Method is derived from Khalil, Mutasim I. (2000), "Calculating Enthalpy of Reaction by a Matrix Method"
Chris C thank you so much!!! Bless your soul
Thankyou a hundred million times! New subscriber!
Thanks you so much. You have taught me so much chemistry. My chemistry teacher was absolutely uselsss. I'm definitely going to pay it forward somehow to someone else😭
God bless u. U have rly helped me over the years.
this dude is better than my chem teacher, TOCT the goat
Thank you Mr Organic Chemistry Tutor, keep up the good work :)
This has been extremely helpful in consolidating what I have learned.