## Van Hoff's Constants

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

DLee_1L
Posts: 103
Joined: Sat Aug 17, 2019 12:17 am

### Van Hoff's Constants

To use the Van Hoff's equation, are there certain values that need to be assumed to be constant like pressure? Or does it not matter as long as we know the delta h, delta s, and temperature before and after?

Norman Dis4C
Posts: 101
Joined: Sat Sep 28, 2019 12:16 am

### Re: Van Hoff's Constants

On the lecture slides, it says both delta H and delta S are constants.

Sjeffrey_1C
Posts: 108
Joined: Wed Feb 20, 2019 12:17 am

### Re: Van Hoff's Constants

Since you're using ΔH naught and ΔS naught, assume conditions are standard.

Anokhi Patel 2B
Posts: 76
Joined: Fri Aug 09, 2019 12:17 am

### Re: Van Hoff's Constants

Delta H and Delta s are the constants.

Jacob Villar 2C
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Joined: Sat Aug 17, 2019 12:18 am

### Re: Van Hoff's Constants

Both delta H and delta S are constants.

rohun2H
Posts: 100
Joined: Wed Sep 18, 2019 12:19 am

### Re: Van Hoff's Constants

I believe you assume standard conditions.

305385703
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

### Re: Van Hoff's Constants

Delta H and delta S are constant. Even though temperature might change the absolute entropy or enthalpy of a system. the change in that value over a reaction will remain constant over different temperatures.