Vant Hoff Equation

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Salma Sudarmadji 2I
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Joined: Fri Jul 15, 2016 3:00 am

Vant Hoff Equation

Postby Salma Sudarmadji 2I » Fri Jan 27, 2017 8:04 pm

In the course reader it says that ln (K2/k1)=delta H/RT2 + delta H/Rt1 and that we can assume that delta S is constant. Why can we assume that delta S is constant?

Paul Sedaros 1B
Posts: 23
Joined: Fri Sep 25, 2015 3:00 am

Re: Vant Hoff Equation

Postby Paul Sedaros 1B » Fri Jan 27, 2017 8:19 pm

I think that assuming delta S is constant is what we do unless otherwise stated in a problem. The reason that I would think that we do assume delta S is constant in the Van't Hoff Equation is because it helps to eliminate the delta S/R terms in both ln K1 and ln K2 when we have ln K2/K1, making the equation easier to solve for the temperature or the K value.

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