## When to use

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

605110118
Posts: 75
Joined: Wed Sep 18, 2019 12:21 am

### When to use

When is this equation used?

ShravanPatel2B
Posts: 100
Joined: Fri Aug 30, 2019 12:18 am

### Re: When to use

The Van't Hoff equation relates the change in the equilibrium constant, K, of a chemical reaction to the change in temperature given the standard enthalpy change.

This equation can be used to analyze the relationship between K and the change in temperature.

Ian Morris 3C
Posts: 101
Joined: Wed Sep 18, 2019 12:18 am

### Re: When to use

it can be used to find K, change in T, and enthalpy

kevinolvera1j
Posts: 103
Joined: Fri Aug 02, 2019 12:15 am

### Re: When to use

You can use it when you can assume that delta H and delta S are the same at both temps.

Ryan Yee 1J
Posts: 101
Joined: Sat Aug 17, 2019 12:16 am

### Re: When to use

The Van't Hoff equation relates the equilibruim constant to standard condition enthalpy and entropy. You can overlap two instances of the Van't Hoff equation to find the change in enthalpy at two different temperatures.

Joowon Seo 3A
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am
Been upvoted: 1 time

### Re: When to use

It relates the change in temperature to the change in reaction constant.

AJForte-2C
Posts: 89
Joined: Wed Sep 30, 2020 10:00 pm
Been upvoted: 1 time

### Re: When to use

This equation relates K (both Kp and Kc) to temperature. So any time a problem is asking about one of those in relation to each other, it's probably a good indication to use it.

haley f
Posts: 86
Joined: Wed Sep 30, 2020 9:49 pm

### Re: When to use

Because this equation relates the change in temperature to the change in reaction constant, you can use it to figure out either one of these things, depending on the information given.