## Free energy

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

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

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

Lara Kristine Bacasen 1L
Posts: 110
Joined: Sat Jul 20, 2019 12:16 am
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### Free energy

Can someone explain why the reaction free energy depend on pressure and the equilibrium constant?

SnehinRajkumar1L
Posts: 101
Joined: Thu Jul 11, 2019 12:15 am

### Re: Free energy

The pressure of a system and the ratio of products to reactants affects how much energy can be produced.

Delaney Smith 1C
Posts: 52
Joined: Thu Feb 28, 2019 12:15 am

### Re: Free energy

If the reaction is at equilibrium, Q=K and ΔG=-RTlnK. If you increase the partial pressure of a product gas, ΔG becomes more positive. If you increase the partial pressure of a reactant gas, ΔG becomes more negative. Therefore, ΔG depends on pressure and K.