## Gibbs energy for gas and liquid phase

$\Delta G^{\circ}= \Delta H^{\circ} - T \Delta S^{\circ}$

$\Delta G^{\circ}= -RT\ln K$

$\Delta G^{\circ}= \sum \Delta G_{f}^{\circ}(products) - \sum \Delta G_{f}^{\circ}(reactants)$

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

### Gibbs energy for gas and liquid phase

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

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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