Van't Hoff Equation

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

Charisse Vu 1H
Posts: 101
Joined: Thu Jul 25, 2019 12:17 am

Van't Hoff Equation

Can someone go over how the van't hoff equation was derived from delta g and how K plays a role in the equation? Thanks!

Jacey Yang 1F
Posts: 101
Joined: Fri Aug 09, 2019 12:17 am

Re: Van't Hoff Equation

The equation is derived from the two equations deltaG = deltaH - TdeltaS and deltaG = -RTlnK set equal to each other. The equation is used to find out how the change in K of a chemical reaction relates to the change in temperature, given a standard enthalpy change.

Sukanya Mohapatra 2G
Posts: 100
Joined: Sat Aug 17, 2019 12:18 am
Been upvoted: 1 time

Re: Van't Hoff Equation

Van't hoff is derived from ΔG=ΔH−TΔS and ΔG= -RTlnK. The Van 't Hoff equation relates the change in the equilibrium constant, Keq, of a chemical reaction to the change in temperature, T, given the standard enthalpy change, ΔH.

705302428
Posts: 50
Joined: Sat Aug 24, 2019 12:16 am

Re: Van't Hoff Equation

It's derived from delta g because delta G equals delta H-T delta S as well as -RTlnK so you can set those two equations equal to each other and solve for lnK.