## How to calculate K [ENDORSED]

$\ln K = -\frac{\Delta H^{\circ}}{RT} + \frac{\Delta S^{\circ}}{R}$

Ashley Garcia 2L
Posts: 33
Joined: Fri Sep 29, 2017 7:05 am

### How to calculate K

How would you calculate K if you are given ΔG°? I used the equation ΔG°=-RTlnK and isolated lnK so that lnK=ΔG°/-RT. How do you isolate the K term from lnK?

vicenteruelos3
Posts: 42
Joined: Fri Sep 29, 2017 7:07 am

### Re: How to calculate K

to isolate k you would do e^lnk

and for the other side of the equation e^....

Sophie 1I
Posts: 51
Joined: Fri Sep 29, 2017 7:04 am

### Re: How to calculate K

From lnK=ΔG°/-RT you take e^x of both sides so the ln will cancel and you will have e^whatever ΔG°/-RT is

Sandhya Rajkumar 1C
Posts: 50
Joined: Fri Jun 23, 2017 11:40 am

### Re: How to calculate K  [ENDORSED]

If you are given ΔG°, you can calculate K by first isolating it. Once you have lnK = ΔG°/-RT you then get rid of the natural log in front of the K by using e. You end up with e^(lnK) = e^(ΔG°/-RT) and the e^ln cancels out, so K = e^(ΔG°/-RT).