delta G for Phase Changes






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Lily Guo 1D
Posts: 64
Joined: Fri Sep 29, 2017 7:03 am

delta G for Phase Changes

Postby Lily Guo 1D » Tue Feb 13, 2018 8:29 pm

Does delta G = 0 for phase changes at the proper melting/boiling points? For example, homework problem 9.91b says that the standard Gibbs free energy for the vaporization of water at 100°C is 0. Why is this? Does this apply for the fusion/vaporization of other substances at their melting/boiling points?

Rachel Lu_dis1H
Posts: 66
Joined: Fri Sep 29, 2017 7:06 am
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Re: delta G for Phase Changes

Postby Rachel Lu_dis1H » Tue Feb 13, 2018 8:34 pm

I believe that at phase changes, it is at equilibrium. And at equilibrium deltaG=0


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