Good question. I **did** multiply by (n_A + n_B). But I just used that to convert the molar (intensive) Gibbs energy (ΔḠ with a line on top) to the extensive Gibbs energy (ΔG without a line on top). ΔG = (n_A + n_B) ΔḠ In case you want more info on molar properties or intensive / extensive properties, see here: th-cam.com/video/u7VOe4_bmQU/w-d-xo.html
Yes! If you multiply Boltzmann's constant by Avogadro's number (to get a value per mole), you'll see that it's actually the exact same number as the gas constant. There's more detail here: th-cam.com/video/sI6I3JZ4tP4/w-d-xo.html
@@PhysicalChemistry Sir you mean to say that the expression Delta(S mix)= -k(XA lnXA+XBlnXB) is entropy of mixing per molecule and if we replace k(boltzman's constant) with Gas constant(R) it represents molar entropy of mixing. Am I correct on this Sir?
what beautiful you say Pchem.thanks alot prof.stuart
Welcome!
4:24 why didn't you write the total number of moles (na+nb) on the left side of the equation (delta-Gmix) when multiplying?
Good question. I **did** multiply by (n_A + n_B). But I just used that to convert the molar (intensive) Gibbs energy (ΔḠ with a line on top) to the extensive Gibbs energy (ΔG without a line on top).
ΔG = (n_A + n_B) ΔḠ
In case you want more info on molar properties or intensive / extensive properties, see here: th-cam.com/video/u7VOe4_bmQU/w-d-xo.html
This is so well explained! Thank you sir
You're quite welcome. I'm glad you liked it
I am disappointed that I didn't find a channel before I did. thanks for the tutorial. I have a
chemical thermodynamics exam tomorrow !!
Glad you found it eventually, and hopefully you did well on your exam.
Great review for my P-chem test this week! Very helpful video
Glad it helped. Good luck on your test!
3:05..Sir can we directly replace the Boltzman's constant with the Gas constant?
Yes!
If you multiply Boltzmann's constant by Avogadro's number (to get a value per mole), you'll see that it's actually the exact same number as the gas constant.
There's more detail here: th-cam.com/video/sI6I3JZ4tP4/w-d-xo.html
@@PhysicalChemistry Sir you mean to say that the expression Delta(S mix)= -k(XA lnXA+XBlnXB) is entropy of mixing per molecule and if we replace k(boltzman's constant) with Gas constant(R) it represents molar entropy of mixing. Am I correct on this Sir?
@@ishaan9017 Yes, that's exactly right
@@PhysicalChemistry Thanks so much Sir
super helpful omg ty so much!
You're very welcome