## Van’t Hoff Equation

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

805383532
Posts: 53
Joined: Thu Jul 11, 2019 12:16 am

### Van’t Hoff Equation

What does the equation measure? How does it relate to gibbs free energy?

Aliya Jain 2B
Posts: 101
Joined: Wed Sep 11, 2019 12:16 am

### Re: Van’t Hoff Equation

The Van't Hoff Equation can be used to calculate the k at a different temperature if change in enthalpy is known and is constant.

kristi le 2F
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

### Re: Van’t Hoff Equation

The vant hoff equation can be used to calculate K at different temperatures if stand enthalpy of real lion is known.

805097738
Posts: 180
Joined: Wed Sep 18, 2019 12:20 am

### Re: Van’t Hoff Equation

kristi le 2F wrote:The vant hoff equation can be used to calculate K at different temperatures if stand enthalpy of real lion is known.

what is real lion

Maya Pakulski 1D
Posts: 105
Joined: Thu Jul 11, 2019 12:17 am

### Re: Van’t Hoff Equation

805097738 wrote:
kristi le 2F wrote:The vant hoff equation can be used to calculate K at different temperatures if stand enthalpy of real lion is known.

what is real lion

probably "real ion" if I had to guess

Veronica_Lubera_2A
Posts: 106
Joined: Sat Sep 14, 2019 12:16 am
Been upvoted: 1 time

### Re: Van’t Hoff Equation

Van't Hoff's equation is:

ln(K2/K1)= (-DeltaH/R)(1/T2 - 1/T1)

So the equation relates enthalpy too but this value should be given in the problem.

Mai V 4L
Posts: 111
Joined: Fri Sep 28, 2018 12:23 am

### Re: Van’t Hoff Equation

Will this be on the final exam formula sheet?

AKatukota
Posts: 100
Joined: Thu Jul 25, 2019 12:18 am

### Re: Van’t Hoff Equation

Should we also know to derive it?

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

### Re: Van’t Hoff Equation

it is used to calculate k at different temperatures

Julia Holsinger_1A
Posts: 50
Joined: Tue Feb 26, 2019 12:16 am

### Re: Van’t Hoff Equation

How do you know to use Van't Hoff Equation? Are there certain questions in problems that signal to use it?

Callum Guo 1H
Posts: 134
Joined: Fri Aug 02, 2019 12:15 am
Been upvoted: 1 time

### Re: Van’t Hoff Equation

ln(K2/K1)= (-DeltaH/R)(1/T2 - 1/T1)

you can use it to calculate K value at a temperature given the K value at another temperature

Jacob Motawakel
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am
Been upvoted: 1 time

### Re: Van’t Hoff Equation

You can calculate K at different temperatures with the Van't Hoff equation. I don't see how it relates to DeltaG though because the only relation between DeltaG and K is with standard DeltaG, and since Van't Hoff equation doesn't calculate K at standard conditions, you can't use that K in the equation: standard DeltaG = -RTlnK