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Gibbs Free Energy - Equilibrium Constant, Enthalpy & Entropy - Equations & Practice Problems

2105 ratings | 209522 views
This chemistry video tutorial provides a lecture review on gibbs free energy, the equilibrium constant K, enthalpy and entropy. it provides a list of equations and formulas as well as the appropriate units. It contains plenty of examples and practice problems. Here is a list of topics: 1. Entropy Definition - Concepts and Examples 2. Entropy of Solids, Liquids, and Gases 3. How To Determine / Predict The Sign of the Entropy Change / Delta S for a reaction 4. Second Law of Thermodynamics - The Entropy of Universe, System and Surroundings 5. Delta G, H, T and S equation 6. Enthalpy - Heat Exchange at Constant Pressure - Endothermic and Exothermic Reactions 7. Gibbs Free Energy and the ability to do useful work 8. Spontaneity - Spontaneous and Nonspontaneous Processes 9. Delta G = 0, Reversible Process at Equilibrium 10. How To Calculate Delta G Naught Using the Equilibrium Constant K 11. Entropy of Reaction = Products - Reactants 12. Entropy = q/T heat absorbed for a reversible reaction and temperature 13. The relationship between temperature and entropy 14. Nonstandard Delta G calculations 15. Delta G - Gibbs Free Energy and Le Chatelier's Principle 16. Delta G Table / Chart - How To Determine if a Reaction is Spontaneous at Low or High Temperatures, Always Spontaneous or Nonspontaneous based on the signs of enthalpy and entropy
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Text Comments (174)
Hein Htet Soe (6 days ago)
Thanks a lot! It helped
christopher bassanyin (11 days ago)
the 78.1666 value at "34:56/53:57 " is not correct you will get 76.5731 thanks
great video. Thank you
Thato Mokone (29 days ago)
When we find the value of Q, are we not suppose to convert the given pressure to moles? don't we use the formula n/v=P/RT ?
Angelo (1 month ago)
I would like to meet up and shake hands with you, thanks! I appreciate individuals that help others,
Arycke (1 month ago)
Disorder and entropy. Wrong.
Little Bai (1 month ago)
man i really love your voice.. everytime i try to study with your videos i get distracted by your voice lol..
Adit Mistry (1 month ago)
When you have a final in 12 hours and you're watching at 2x speed
Karan Patel (1 month ago)
I love you dude
Gina Rowley (1 month ago)
Wonderful video! At 7:02 wondering how the enthalpy number for water is 189 if H2 is 131 and O is 161??
Mega Pelotes (1 month ago)
I learned pretty much all of my science classes off the internet and aced every test in those classes (1-2) --> (AP), really love the internet use it to learn !
Ploy Yindee (1 month ago)
Next week is my midterm exam . You are my teacher
Stephen Rose (1 month ago)
Awesome video, as always JG.
Stephen Rose (1 month ago)
But, if you didn't have the table for predicting spontaneous or nonspontaneous reactions and you used +100 instead of -100, wouldn't you get the opposite outcomes and why would it be wrong to do that?
Stephen Rose (1 month ago)
Why would a reaction that is spontaneous at a low temperature, not also be spontaneous at a high temperature?
faisal arafat (1 month ago)
Man you deserve millions of subscriber
James Burmeister (2 months ago)
Just wanted to come back again and say thank you a lot. I knew all the material for the quiz today and i gott a 100% thank you
James Burmeister (2 months ago)
Best Chemistry teacher around! Thank you so much for all the videos that you provide, they are always very educational and you are helping me ace all my classes and go to medical school. I can't be more grateful, thank you.
An Doan (2 months ago)
i know like all of these things first hand, but for some reason i feel like i am not understanding something....
Colin Clarke (2 months ago)
Thank you!
Valerie Xiong (2 months ago)
Why can't real college profs teach like this man...
Mira (2 months ago)
Love your videos
Shariffa Kassam (2 months ago)
Watched a million videos but yours always clear things up, need to stop wasting my time and just watch yours first! Thanks!! :)
Paris Sitochi (3 months ago)
amazing, really helpful!
Omar Afify (3 months ago)
around minute 8:27 you subtract the 205 at the end but aren't you supposed to add it. so it should be (378-262+205) right?
Leon Cambionz (3 months ago)
Who needs lectures when u got chem tutor U the best bro keep it up im passing cause of uuuuuu✊✊✌✌
Fay (4 months ago)
Thank you. 😚
Simphiwe Nxumalo (4 months ago)
thank you so much now there is light
Yamkela Mtshiza (4 months ago)
you are the best
Eleojo Kehinde (4 months ago)
Thank you for this video. It is really helpful.
Ryan Agar (5 months ago)
at 34:00, why does it go from deltaG/-RT to -DeltaG over RT. Can someone explain this to a simpleton.
Sammy5k (5 months ago)
*All-nighter intensifies*
Shakaama (5 months ago)
How in the world you make this video without creating CC (closed captions ). Even just uploading the raw text file of the script works on youtube.
Amy Bulfin (6 months ago)
Wahlberg do ya thang
joyarogers (6 months ago)
I love, love, love the number of examples that you give for each topic. With each video, I leave with a clear understanding and plenty of examples to refer back to. Thank you!
Noelle Mercury (7 months ago)
I have a final on this in 11.5 hours
Joy Z (7 months ago)
I swear this channel is gold. My test grades have improved!
lydia (7 months ago)
just wanted to acknowledge how helpful your videos were to me!!! I watched relevant videos before my exams during chem 1 and chem 2 this past freshman year & got A's in both courses. thanks for being a great explainer; you are a life saver!
Dogukan Kayhan (7 months ago)
Your videos are extremely helpful, I think you've ousted all the tutors on youtube in terms of quality and depth of teaching. One question, at 36:00, isn't K the equilibrium constant? If so, why do you exclusively state when \DeltaG=0, "The system for the most part is at equilibrium" while not claiming that for other values of K. Regards.
Ayavuya Genu (7 months ago)
thank you very much good sir
Patrick Leung (8 months ago)
can you be my new chem teacher.............
shushmita love hindia (8 months ago)
DG:DH-TDs👈
Trace Vancleave (8 months ago)
gods work I swear
Purple Noodles (8 months ago)
Do you get paid for what you do? You are so good at what you do and I bet it takes so long to make these videos. You deserve so much support and thank you for taking the time to help us students succeed in school. I very very much appreciate your channel and your videos have helped me so much with chemistry and Calculus.
M M (7 months ago)
Purple Noodles support him https://www.patreon.com/
Pegah MT (8 months ago)
Im not even able to express how much i love this
M M (7 months ago)
Pegah MT https://www.patreon.com/ support him. Only $10
Takele Getachew (8 months ago)
Thank you so much for your video it is helping me
Victor Martinez (8 months ago)
It’s not too long if at the end of the day you learned from it
sheryl d (8 months ago)
thank you. It is very helpful
Samira Musse (9 months ago)
OMG this is a great video,,thanks so much for your effort, it's long but it's worth it,,,you explain better than my teacher
Radzhesh Laptev (9 months ago)
Outstanding video (as well as most of those that I found on this channel ) Thank you very much
Giga Gambashidze (9 months ago)
you're a superhero, god bless.
gunthertf2 (9 months ago)
did your math wrong at 8:20 , should be -88 not -89
Paige Brady (9 months ago)
Its 1:30am and I've been reading my chemistry book all night trying to understand this stuff. And the moment I come across your video its suddenly clear as day! This is a blessing. I was about to throw in the towel on the whole class. Forget paying for college when you have youtube lol
Helpontheway 7 (10 months ago)
I feel set up when I get an answer with a lot of 6’s.
Vladimir Cabanez (10 months ago)
Thanks for uploading this video,,, really helpfull
Anytime
Spencer Fayles (10 months ago)
love you bro
Paul Christian Ledesma (10 months ago)
at 33:00 what is R? is it a constant?
Xen (10 months ago)
+ +, high = -S - -, low = -S  +, -  = Always +S -,+ = Always -S
CraverCuts (10 months ago)
im gunna fucking fail chemistry
Baransel G (10 months ago)
u r the best man. really. I fucking love u even i dont know u...
SilentKill 4545 (11 months ago)
this man is my hero
Kevin Torres (11 months ago)
This cleared up so much. I feel ready for my exam.
Sofía Regalado (11 months ago)
Thank you!!
Kohila G (11 months ago)
WOW.
Majed ALjaber (11 months ago)
thanks a lot for such awesome video ... very good job
fawzi hasan (1 year ago)
Thank you
Manuela Lamela (1 year ago)
youre amazing
K P (1 year ago)
"surroundins"
thanks 🙏🏽 ❤️
Rita Beniamin (1 year ago)
I got a B on my exam after watching your video!!!! you are amazingggg. Thank you soooo much. God bless <3
Douglas Murphy (1 year ago)
Other Tutors:"Here lets give you 40 mins of completely useless information and then spend 30 seconds on the most basic problem related to your question. That way you learn nothing." This Guy: "Let's tear this entire subject apart until you're able to write a BOOK on how much you nailed your text."
Akbar Rahmatullah (1 year ago)
Superbly presented at the right pace. Very good.
Miss Coco (1 year ago)
at 7:11, why did you put the superscript 0 in front of the S, if the reaction isn't happening at standard temperature? the video was really helpful btw, thank you.
Jonathan Chen (1 year ago)
Best tutor on youtube. Doesn't bullshit just straight to the point and gives you the info you need to know unlike khan academy that just takes you in circles. u da best
erisa eri (1 year ago)
Worth it!
KAK BRO (1 year ago)
Best place to learn
blasphemerous (1 year ago)
Thank you for taking the time to avail this kind of thing. Your videos have helped me quite a lot so far in my studies!
Sahil Bisht (1 year ago)
can u explain why u have taken hydrogen entropy in calculating entropy of the system (7:46mins) as hydrogen is in its elementary form..... but while finding gribbs energy u have not taken Hydrogen (30:06mins) ........Btw great video sir👍.. really very helpful
Angel Valle (1 year ago)
if you decrease the denominator, the value of the whole fraction does what? This is at 50 minutes. Not making out what you said at 50 minutes, sounds like you said the value of the whole fraction goes uum. can you clarify please
ErnestJoy (1 year ago)
at 31:11, why did you multiple the the negative sign to the reactant side? Is it not suppose to be be products-reactants not (products)-(reactants)?
StfuSiriusly (1 year ago)
its the same thing
Elif (1 year ago)
Hi, where does the - go away from -RT when he brings -RT to the other side ---> he wrote deltaG/RT, but why not deltaG/ - RT? pls can someone answear me!! sorry for my enlgish!!
Gao Mo (1 year ago)
You are the best . thank you for your explanation! Now everything is making sense for me
jane gestole (1 year ago)
Thank you for making this video!! it is worth to watch :) good luck to me
Brandice Marie (1 year ago)
At 32:55, how did you get the value for R?
Sofia Gabriela (1 year ago)
R is a constant . Depending what units you are using R constant will be different.
Aw Shucks (1 year ago)
I love your videos but could you put timestamps on each individual section? It gets tedious flipping through for any individual topic.
couchpotatoe123 (1 month ago)
shut up, hes doing the most for us as is.
kanakam rajinikanth (1 year ago)
pleasent voice with good explanation made me easy to understand tq u
Drew Eric Noftle (1 year ago)
I've looked at a lot of videos looking for a simple explanation of ΔS, and the first 5 minutes of your video did it best! Thank you.
Zheng SUn (1 year ago)
final is in 9 hours.....
Arda Aral (13 days ago)
I feel you bro
johnnywaffles23 (30 days ago)
howd yall do
Emine BAI (2 months ago)
3hours
Killer90807 (3 months ago)
1 hour and 27 minutes lmao
Taylor Clay (8 months ago)
Zheng SUn mine is in four hours
Joi Alexis (1 year ago)
Around the 34:41 mark, I'm not understanding how he got e^78.17. Everytime I try it in my calculator, I get e^76.57. Doesn't seem like a big difference but it is. Can someone please explain??
christopher bassanyin (11 days ago)
but the method is perfect
christopher bassanyin (11 days ago)
yh he made a mistake the value is 76.5731
Lisa Autry (5 months ago)
yes, doing this is tedious,! great job though
Lisa Autry (5 months ago)
yes, I got the same answer > 76.57, nope not a big difference but still
Rahul Sharma (10 months ago)
tryout e = 2.718 standard value of e, 2.718^78.17
Eli Tanenbaum (1 year ago)
Does delta s in the equation delta g equals delta h minus T delta s refer to the entropy of the surroundings or the system? (22:00)
Sahil Satav (11 months ago)
Eli Tanenbaum system. But it can be applied for the surroundings too
Isakov Artur (1 year ago)
At 43:34, "the contribution of RT ln Q is negative. That means the reaction is becoming more spontaneous." By looking at the written equation, how do we know whether reactants or products are being added?
Johnny Nguyen (1 year ago)
When you have a professor that sucks at teaching... at least we got The Organic Chemistry Tutor :)
Claudia Martin (1 year ago)
this is awesome
Mahad Abshir (1 year ago)
Dude you are seriously the best. I usually can't learn very well in my class and space out alot but listening to you is really nice and easy and I was able to get it. Worth the 56 minutes I spent.
Nur Azam (1 year ago)
whats ur instagram boo
harrymar11 (1 year ago)
I have my chem 2 finals in 3 days, this was very helpful.
Thanks
Kitkat Kitkat (1 year ago)
He won't say 666...
Patricia Martin (1 year ago)
You are an incredible teacher! The content and the examples you add are extremely helpful. Thank you so much for your videos, studying for this AP exam coming up and I am so glad I found them. Here's to a fighting chance at passing!!
Patricia Martin (1 year ago)
(Hopefully get back to you with good news in July! Thanks again, two thumbs up)
Patricia Martin (1 year ago)
Wow, thank you very much! Really appreciate it!
You're very welcome. Here are some videos that can help you with the multiple choice section of the ap exam: https://www.youtube.com/watch?v=5yw1YH7YA7c https://www.youtube.com/watch?v=lSmJN1_uVpI
wight blue (1 year ago)
İs it highschool subject ?
King Nator (1 year ago)
As always great video.

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