## When to apply the Van't Hoff Equation

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

juleschang16
Posts: 55
Joined: Fri Sep 28, 2018 12:19 am

### When to apply the Van't Hoff Equation

Since the Van't Hoff Equation is derived from the Gibbs Free Energy equation, how will we know which one to use? Like, in what scenario would the Van't Hoff Equation be used over the standard Gibbs Free Energy equation where deltaG = deltaH - T*deltaS ?

Jack DeLeon 1B
Posts: 30
Joined: Fri Sep 28, 2018 12:20 am

### Re: When to apply the Van't Hoff Equation

the Van't Hoff equation can be used to find the equilibrium constant of the reaction while the gibb's free energy equation can be used to find deltaG, which can then determine if the reaction is spontaneous or not

Tyler Angtuaco 1G
Posts: 130
Joined: Wed Sep 11, 2019 12:16 am

### Re: When to apply the Van't Hoff Equation

You'll use the van't hoff equation when you're observing a reaction conducted at two different temperatures and their respective equilibrium constants.

Anika Chakrabarti 1A
Posts: 102
Joined: Sat Aug 24, 2019 12:17 am

### Re: When to apply the Van't Hoff Equation

It can be used to compare the equilibrium constants when the reaction takes place at two different temperatures.

WYacob_2C
Posts: 102
Joined: Sat Jul 20, 2019 12:16 am

### Re: When to apply the Van't Hoff Equation

You can use this equation when you are trying to calculate K at different temperatures if delta H is known.

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

### Re: When to apply the Van't Hoff Equation

The vant hoff equation is used when we want to calculate the K of a reaction at a certain temperature. Gibbs free energy is mostly to determine if a reaction will be spontaneous at a given temperature.