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

2422 ratings | 234344 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 (189)
Sacha Vucinec (4 days ago)
Why is the ΔG for a pure element 0?
Zidan S (8 days ago)
This guys voice is genuinely annoying
Kendall Jenner (9 days ago)
final exams in 8 hrs.
Gina Garcia (15 days ago)
i love you, i’m about to get this bread on my test thank you.
Golsin Rashid (15 days ago)
You are the best person delivering chemical subjects I have ever seen. Your calm voice makes me understand very well. When I listen to others yelling or screaming my brain just shut down. I cannot hear more. Thank you very much for all your hard work.
Dev Anand (21 days ago)
It's a lot of sixes...
percy smith (1 month ago)
Incredible and artistic piece of lecturing...well planned 😍... you're awesome 😎
sanjursan (1 month ago)
Good stuff, plus I like his font.
Regularguy Anonymous (1 month ago)
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Helen Zare (1 month ago)
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Hein Htet Soe (2 months ago)
Thanks a lot! It helped
chriss bass (2 months 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 (3 months 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 (3 months ago)
I would like to meet up and shake hands with you, thanks! I appreciate individuals that help others,
Arycke (3 months ago)
Disorder and entropy. Wrong.
Little Bai (3 months ago)
man i really love your voice.. everytime i try to study with your videos i get distracted by your voice lol..
Adit Mistry (3 months ago)
When you have a final in 12 hours and you're watching at 2x speed
Karan Patel (3 months ago)
I love you dude
Gina Rowley (3 months 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 (3 months 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 (3 months ago)
Next week is my midterm exam . You are my teacher
Stephen Rose (4 months ago)
Awesome video, as always JG.
Stephen Rose (4 months 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 (4 months ago)
Why would a reaction that is spontaneous at a low temperature, not also be spontaneous at a high temperature?
faisal arafat (4 months ago)
Man you deserve millions of subscriber
James Burmeister (4 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 (4 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 (4 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 (4 months ago)
Thank you!
Tae Kook (4 months ago)
Why can't real college profs teach like this man...
Mira (4 months ago)
Love your videos
Shariffa Kassam (4 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 (5 months ago)
amazing, really helpful!
Omar Afify (6 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 (6 months ago)
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Fay (6 months ago)
Thank you. 😚
Simphiwe Nxumalo (6 months ago)
thank you so much now there is light
Yamkela Mtshiza (6 months ago)
you are the best
Eleojo Kehinde (7 months ago)
Thank you for this video. It is really helpful.
Ryan Agar (7 months ago)
at 34:00, why does it go from deltaG/-RT to -DeltaG over RT. Can someone explain this to a simpleton.
Sammy5k (7 months ago)
*All-nighter intensifies*
Shakaama (7 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 (8 months ago)
Wahlberg do ya thang
joyarogers (8 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 (9 months ago)
I have a final on this in 11.5 hours
Joy Z (9 months ago)
I swear this channel is gold. My test grades have improved!
lydia (9 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 (10 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 (10 months ago)
thank you very much good sir
Patrick Leung (10 months ago)
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Trace Vancleave (10 months ago)
gods work I swear
Purple Noodles (10 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 (9 months ago)
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Takele Getachew (10 months ago)
Thank you so much for your video it is helping me
Victor Martinez (10 months ago)
It’s not too long if at the end of the day you learned from it
sheryl d (10 months ago)
thank you. It is very helpful
Samira Musse (11 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 (11 months ago)
Outstanding video (as well as most of those that I found on this channel ) Thank you very much
Giga Gambashidze (11 months ago)
you're a superhero, god bless.
gunthertf2 (11 months ago)
did your math wrong at 8:20 , should be -88 not -89
Paige Brady (11 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 (1 year ago)
I feel set up when I get an answer with a lot of 6’s.
Vladimir Cabanez (1 year ago)
Thanks for uploading this video,,, really helpfull
Spencer Fayles (1 year ago)
love you bro
at 33:00 what is R? is it a constant?
CraverCuts (1 year ago)
im gunna fucking fail chemistry
Baransel G (1 year ago)
u r the best man. really. I fucking love u even i dont know u...
SilentKill 4545 (1 year ago)
this man is my hero
Kevin Torres (1 year ago)
This cleared up so much. I feel ready for my exam.
Sofía Regalado (1 year ago)
Thank you!!
Kohila G (1 year ago)
Majed ALjaber (1 year 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)
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 (3 months 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.....
miguel martirez360 (20 days ago)
Mine is in 20 hrs
Arda Aral (2 months ago)
I feel you bro
johnnywaffles23 (3 months ago)
howd yall do
Emine BAI (4 months ago)
Killer90807 (5 months ago)
1 hour and 27 minutes lmao
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??
chriss bass (2 months ago)
but the method is perfect
chriss bass (2 months ago)
yh he made a mistake the value is 76.5731
Lisa Autry (7 months ago)
yes, doing this is tedious,! great job though
Lisa Autry (7 months ago)
yes, I got the same answer > 76.57, nope not a big difference but still
Rahul Sharma (1 year 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 (1 year 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?

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