## Free energy of reaction

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

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

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

Seohyun Park 1L
Posts: 73
Joined: Fri Sep 28, 2018 12:29 am

### Free energy of reaction

Why does the free energy of a reaction (not the standard free energy) depend on the pressure and equilibrium constant?

Ashley Kim
Posts: 62
Joined: Fri Sep 28, 2018 12:19 am
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### Re: Free energy of reaction

The free energy equation is deltaG = deltaG(standard) + RTlnK.
K is the equilibrium constant, so the free energy depends on the equilibrium constant. Sometimes, when given partial pressures, they are used to calculate the equilibrium constant.

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