it's insane how you keep making videos at the same exact time that i need them, and they're SPECIFICALLY what i need. thank you. You're really good at this btw.
@@ChadsPrep Certainly. It's that and molecular orbitals. Not sure what will be contained in gen chem when it comes to MO compared to ochem which i've passed. thanks In your electrochem video I appreciated how you made us think of a battery acting as an electrolytic cell during recharge.
I won't get a chance to make a new molecular orbital video in the immediate future, but I do have one already in my old playlist...lesson 9.5 in "Chad's General Chemistry Videos." The basics will be similar to what you probably were presented in ochem but with a special presentation on the MO diagram for diatomic molecules included as well. Best in your studies!
You're very welcome! And if you're taking Pchem, then you may prefer my more robust treatment of the subject here: www.chadsprep.com/chads-elementary-physical-chemistry-videos/ 😊
Chad - I am trying to wrap my head around something based on what I have grasped from your video which, by the way, is fantastic - I wish I had instructors like you during my college days which was EONS ago. Coming back to my question, let me try and articulate it as clearly as I can. Let's take the case when BOTH DeltaH as well as DeltaS are negative - I think a good example would be adsorption of a gas molecule onto a substrate. In this case, the (T x DeltaS) term is going to be negative. In order to determine DeltaG, we are now subtracting this "negative" quantity (T x DeltaS) from DeltaH and the subtraction will reverse the sign of the product (T x DeltaS). Now, the overall sign of DeltaG will depend on the relative magnitudes of DeltaH and the product (T x DeltaS). Whichever is larger will determine the overall sign of DeltaG. If the magnitude of the two quantities are the same, then DeltaG would be "zero". The only variable that I see which can contribute to DeltaG becoming "zero" is "T" . Would we then conclude, based on this example of Adsorption that the particular "T" value of the gas phase that causes DeltaG to be "zero" is the temperature at which the Adsorption will achieve equilibrium? I realize that DeltaH and DeltaS may also be functions of T but let us neglect the differences caused by their dependence on T for the time being. Sorry for the long message but it would help me immensely to know if I am interpreting your explanation correctly. Thank you very much for your feedback. Also, if I misinterpreted your explanation, please let me know the flaw in my thinking.
Thank you so much! This helped so much with the difference between ΔG° and ΔG. I'm a little confused about Gibbs Free Energy and phase changes. I know that ΔG° is 0 for a phase change at the corresponding temperatures, but why exactly is this the case? Also, is it 0 for all temperatures, or just the melting point/boiling point temperatures?
Might not be the best forum for this particular question, but If the universe is expanding, how is there a finite amount of energy in it? Is it using energy to expand? How does the expansion affect the current state?
It isn't 'using' energy so much as transferring energy between different forms - this is the Law of Conservation of Energy. All of these transfers are occuring in the balance of time, space, matter and energy that we have in the universe... it would be a good topic to research if you are interested!
I do plan to redo the physics 1 and 2 lectures (in plain English) but I'll be working on finishing up these series and some final exam reviews for gen chem and ochem first. Then it's a new biochem series, so it will probably be the Fall semester before I get to the Physics lectures at the earliest. Happy Studying!
Chad can you make a more advanced video on this (for physical chemistry)? I am currently in physical chemistry 1 (thermodynamics and kinetics) and my first exam is on Monday
www.chadsprep.com/chads-elementary-physical-chemistry-videos/ Good news! I have a free set of videos for a physical chemistry thermodynamics course, just not on youtube. But they are back on my site at the above link. Much more comprehensive as Chapter 3 is on Enthalpy, Chapter 4 on Entropy, and Chapter 5 on Gibbs Free Energy. But I think it is just what you're looking for. Happy Studying!
@@ChadsPrep Thank you so much! Question: at the 39:00 minute mark, you state that you can find |Delta H| by setting it equal to |-TDeltaS|. Why does that work? And what does that tell us? Thanks!
@@RinaNewhouse So this is based on the equation: DG = DH - TDS If Delta G is negative a reaction is spontaneous, and if Delta G is positive the reaction is nonspontaneous. For reactions in which Delta H and Delta S are either both positive or both negative there is a temperature dependence for spontaneity. Setting Delta G equal to zero allows us to determine that threshold temperature. 0 = DH - TDS DH = TDS And then solving for temperature: T = DH/DS And this would be the temperature in Kelvin at which the reaction would change from being nonspontaneous to spontaneous (or vice-versa). TH-cam comments aren't the best medium for explaining this but hope this helps!
Your website isnt working today :( normally i watch on there but i came here since it wasnt working... Anyway thank you so much for these videos, you helped me get the highest grade in my class on my last chem exam
Since I am not an English speaking person, a combination of 0.75 playback speed and subtitle make it a perfect enjoyable lecture. Thank you so much.
You're welcome - Glad you found the optimum solution!
it's insane how you keep making videos at the same exact time that i need them, and they're SPECIFICALLY what i need. thank you. You're really good at this btw.
You're so welcome! And glad the timing has been perfect for you. Might you need a new video on Nuclear Chemistry in the near future?
Happy Studying!
@@ChadsPrep Certainly. It's that and molecular orbitals. Not sure what will be contained in gen chem when it comes to MO compared to ochem which i've passed.
thanks
In your electrochem video I appreciated how you made us think of a battery acting as an electrolytic cell during recharge.
I won't get a chance to make a new molecular orbital video in the immediate future, but I do have one already in my old playlist...lesson 9.5 in "Chad's General Chemistry Videos." The basics will be similar to what you probably were presented in ochem but with a special presentation on the MO diagram for diatomic molecules included as well. Best in your studies!
You're saving my Physical Chemistry exam, thank you so much!!
You're very welcome! And if you're taking Pchem, then you may prefer my more robust treatment of the subject here: www.chadsprep.com/chads-elementary-physical-chemistry-videos/ 😊
Thank you SO MUCH for this video! Please keep doing them! This is EXACTLY what ASU students need right now! :')
Awesome Ellinor and you're welcome! I hope to post one for the chapter on Electrochemistry tomorrow as well! Happy Studying!🙂
Chad - I am trying to wrap my head around something based on what I have grasped from your video which, by the way, is fantastic - I wish I had instructors like you during my college days which was EONS ago. Coming back to my question, let me try and articulate it as clearly as I can. Let's take the case when BOTH DeltaH as well as DeltaS are negative - I think a good example would be adsorption of a gas molecule onto a substrate. In this case, the (T x DeltaS) term is going to be negative. In order to determine DeltaG, we are now subtracting this "negative" quantity (T x DeltaS) from DeltaH and the subtraction will reverse the sign of the product (T x DeltaS). Now, the overall sign of DeltaG will depend on the relative magnitudes of DeltaH and the product (T x DeltaS). Whichever is larger will determine the overall sign of DeltaG. If the magnitude of the two quantities are the same, then DeltaG would be "zero". The only variable that I see which can contribute to DeltaG becoming "zero" is "T" . Would we then conclude, based on this example of Adsorption that the particular "T" value of the gas phase that causes DeltaG to be "zero" is the temperature at which the Adsorption will achieve equilibrium? I realize that DeltaH and DeltaS may also be functions of T but let us neglect the differences caused by their dependence on T for the time being. Sorry for the long message but it would help me immensely to know if I am interpreting your explanation correctly. Thank you very much for your feedback. Also, if I misinterpreted your explanation, please let me know the flaw in my thinking.
Thank you so much! This helped so much with the difference between ΔG° and ΔG. I'm a little confused about Gibbs Free Energy and phase changes. I know that ΔG° is 0 for a phase change at the corresponding temperatures, but why exactly is this the case? Also, is it 0 for all temperatures, or just the melting point/boiling point temperatures?
I think u just saved my life in my chem final! Bless u sir! U make incredible videos!
Glad you found the channel, Zoey Luo - Happy Studying!
You are a fantastic teacher
Thank you Amanda! 😃 Glad you found this lesson helpful!
you deserve so many more subscribers this is awesome
Thanks, Tyler - Glad you find the channel useful!
Might not be the best forum for this particular question, but If the universe is expanding, how is there a finite amount of energy in it? Is it using energy to expand? How does the expansion affect the current state?
It isn't 'using' energy so much as transferring energy between different forms - this is the Law of Conservation of Energy. All of these transfers are occuring in the balance of time, space, matter and energy that we have in the universe... it would be a good topic to research if you are interested!
Very nice content, thanks from a Brazilian student of Bioprocess and Biotechnology Engineering
Thanks for watching, Diogo - Happy Studying!
You are a life saver!! Could you do a Physics(1&2) in plain English next?
I do plan to redo the physics 1 and 2 lectures (in plain English) but I'll be working on finishing up these series and some final exam reviews for gen chem and ochem first. Then it's a new biochem series, so it will probably be the Fall semester before I get to the Physics lectures at the earliest. Happy Studying!
Chad can you make a more advanced video on this (for physical chemistry)? I am currently in physical chemistry 1 (thermodynamics and kinetics) and my first exam is on Monday
www.chadsprep.com/chads-elementary-physical-chemistry-videos/
Good news! I have a free set of videos for a physical chemistry thermodynamics course, just not on youtube. But they are back on my site at the above link. Much more comprehensive as Chapter 3 is on Enthalpy, Chapter 4 on Entropy, and Chapter 5 on Gibbs Free Energy. But I think it is just what you're looking for. Happy Studying!
Chad!! Me again! I’m back rewatching your videos to help prepare me for my quiz today and exam tomorrow!! #summerthingz 😊 LOVE your content.
Glad the channel is helpful, Rina - your diligence should pay off!
@@ChadsPrep Thank you so much! Question: at the 39:00 minute mark, you state that you can find |Delta H| by setting it equal to |-TDeltaS|. Why does that work? And what does that tell us? Thanks!
@@RinaNewhouse So this is based on the equation: DG = DH - TDS
If Delta G is negative a reaction is spontaneous, and if Delta G is positive the reaction is nonspontaneous. For reactions in which Delta H and Delta S are either both positive or both negative there is a temperature dependence for spontaneity. Setting Delta G equal to zero allows us to determine that threshold temperature.
0 = DH - TDS
DH = TDS
And then solving for temperature:
T = DH/DS
And this would be the temperature in Kelvin at which the reaction would change from being nonspontaneous to spontaneous (or vice-versa).
TH-cam comments aren't the best medium for explaining this but hope this helps!
Another question: at 1:00:00, when Q>K, equilibrium shifts toward the products, and when Q
And mathematically speaking, how does Delta GK?
outstanding teacher
Thank you
Amazing work! Thank you.
Thanks Elizabeth and you're welcome!
you're a legend
Thanks, Fahad!
Your website isnt working today :( normally i watch on there but i came here since it wasnt working...
Anyway thank you so much for these videos, you helped me get the highest grade in my class on my last chem exam
You're literally the best thank you so much!
Thank you, Nicky!
Is there example of questions that already been solved and explained? You helping me alot. Thank you 😊 💓
Hey Black Sakura! Great to hear that you found this helpful, what course are you looking for practice questions on?
Like a true teacher
Thanks!
really enjoying your videos sir, lots of love from Pakistan
Thanks and welcome, chem crown, from U.S.
Great videos! Thank you!
Glad you like them, Anne - thanks for saying so!
21:27 try saying "wingardium leviosa!" And see what happens to the marker then 😉
Nice video sir 👌
Thanks!
literally wish that you were my professor
Thanks, bb girl!