## Constants in Van’t Hoff Equation [ENDORSED]

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

Drew Myers 4G
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### Constants in Van’t Hoff Equation

Are deltaS and deltaH considered constant when comparing a reaction at two different temperatures, or are other variables in the equation constant?

Naji Sarsam 1F
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Joined: Sat Aug 17, 2019 12:18 am

### Re: Constants in Van’t Hoff Equation

Yes, delta S and delta H are assumed to not be temperature-dependent, meaning constant, when using the vant hoff equation

Chem_Mod
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### Re: Constants in Van’t Hoff Equation  [ENDORSED]

In the Van’t Hoff Equation, deltaS and deltaH are constant when comparing the same reaction at two different temperatures.

Posts: 53
Joined: Fri Aug 02, 2019 12:16 am

### Re: Constants in Van’t Hoff Equation

In the Van't Hoff equation, both deltaS and deltaH are assumed to be constant independent of temperature, however, only deltaH shows up in the most easily usable form of the equation.

kristi le 2F
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### Re: Constants in Van’t Hoff Equation

The entropy and enthalpy are different at different temperatures but their delta's are the same.