Gibbs energy for gas and liquid phase






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manasa933
Posts: 72
Joined: Fri Sep 29, 2017 7:04 am

Gibbs energy for gas and liquid phase

Postby manasa933 » Tue Feb 06, 2018 10:58 am

Why does the Gibbs free energy decrease more sharply with temperature for a gas than for the liquid?

Anika_Patel_1G
Posts: 32
Joined: Fri Sep 29, 2017 7:06 am

Re: Gibbs energy for gas and liquid phase

Postby Anika_Patel_1G » Tue Feb 06, 2018 12:07 pm

This happens because the molar entropy of the gas phase is greater. As temperature increases, the TS portion of G=H-TS increases as well, decreasing G. If the S (entropy) is greater then an even larger amount is going to be subtracted resulting in a sharper decrease.


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