## Van Hoff Equation

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

JohannaPerezH2F
Posts: 94
Joined: Wed Sep 18, 2019 12:18 am

### Van Hoff Equation

So im studying for the test/final and i came upon a slight confusion. For the Hoff equation, I have two slightly different ones. One of which my TA provided for me and other is from the textbook. The textbook reads lnK2/k1=change in H/R(1/t1-1/t2) and the one my ta derived is lnk2/k1=change in H/R(1/t2-1/t1). Are they the same or is one correct, the other is not? help please and thank you

Shannon Asay 1C
Posts: 102
Joined: Fri Aug 09, 2019 12:16 am

### Re: Van Hoff Equation

I think they're both the same. I believe one equation is lnk2/k1=-delta(h)/R(1/t2-1/t1) and the other is lnk2/k1=delta(h)/R(1/t1-1/t2). When you do the math, I believe they work out to be the same things.

005162902
Posts: 102
Joined: Wed Sep 18, 2019 12:15 am

### Re: Van Hoff Equation

My TA told me the order shouldnt matter