## Concentration and free energy

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

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

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

Tam To 1B
Posts: 72
Joined: Fri Sep 28, 2018 12:25 am

### Concentration and free energy

Does changing the concentration of a substance in a reaction affect the free energy?

Posts: 60
Joined: Fri Sep 28, 2018 12:27 am

### Re: Concentration and free energy

Yes, since delta G = delta G standard + RTlnQ, and Q is concentration of products over reactants, Gibbs free energy does depend on concentration.

Carine Tamamian 2B
Posts: 61
Joined: Fri Sep 28, 2018 12:23 am

### Re: Concentration and free energy

Yes! it's products and reactants concentrations that affect the free energy.