## delta S total and delta G

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

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

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

Clement Ng
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### delta S total and delta G

How are delta S total and delta G related?

Michelle Chernyak 1J
Posts: 33
Joined: Fri Sep 29, 2017 7:06 am

### Re: delta S total and delta G

delta S total is the total entropy change that occurs during a reaction, while delta G is the total change in gibbs free energy that dictates if the reaction is spontaneous or not. In order to solve for delta G, we can often use delta S in the equation, delta G= deltaH -Tdelta S

Jessica Benitez 1K
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Joined: Fri Sep 29, 2017 7:04 am

### Re: delta S total and delta G

Depending on the signs of delta H and delta S, the sign of delta G will be positive or negative and we can therefore determine if a reaction is spontaneous or not. To guarantee spontaneity we need delta H to be negative and delta S to be positive.