Derivations

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Anya 1G
Posts: 46
Joined: Fri Sep 29, 2023 10:15 am

Derivations

Postby Anya 1G » Fri Mar 15, 2024 11:55 am

Which equations do we have to know how to specifically derive for the final exam, if any?

Giselle_Arreguin_2K
Posts: 83
Joined: Fri Sep 29, 2023 11:59 am

Re: Derivations

Postby Giselle_Arreguin_2K » Fri Mar 15, 2024 11:56 am

I think its essential to know that the vant hoff equation relates temperature to the equillibrium constant and you get this by setting the two gibbs free energy equations equal to each other.

Wesley Greene
Posts: 88
Joined: Fri Sep 29, 2023 10:48 am

Re: Derivations

Postby Wesley Greene » Sat Mar 16, 2024 8:49 pm

Could you please expand on this? How do you set the two equations equal to each other to get the Vant Hoff equation?

Cristina Subratie 1C
Posts: 54
Joined: Sun Oct 01, 2023 8:23 am

Re: Derivations

Postby Cristina Subratie 1C » Sat Mar 16, 2024 9:11 pm

the derivative of this equation would look like this:
-RTlnK = -H - Ts
lnK= (H/-RT) - (Ts/-RT)
lnK = (H/-RT) + (q/RT)
lnK = (H/-RT) + (H/RT)
lnK = -H/R (1/T - 1/T)
lnK2 - lnK1 = -H/R (1/T2 - 1/T1)
ln(K2/K1) = -H/R (1/T2 - 1/T1) Van't Hoff equation

* H is the change in H and s is the change in s - I just could not add that because of notation on keyboard*


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