## 9.63 Positive delta G

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

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

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

Josephine Lu 4L
Posts: 62
Joined: Fri Sep 28, 2018 12:18 am

### 9.63 Positive delta G

Why are compounds with a positive free energy of formation (delta G) unstable?

ChathuriGunasekera1D
Posts: 78
Joined: Fri Sep 28, 2018 12:17 am

### Re: 9.63 Positive delta G

Hi! A negative dG of formation means that the G of reactants is greater than the G of products, so if free energy decreases, the end product is more stable. Lower energy means more stability.

Camille Marangi 2E
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

### Re: 9.63 Positive delta G

For even more clarification, this would mean that the more free energy that the reaction has, the less stable it will be in general. More energy means less stability.

yuetao4k
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Joined: Fri Sep 28, 2018 12:27 am
Been upvoted: 1 time

### Re: 9.63 Positive delta G

A positive delta G indicates that the reaction is nonspontaneous, or nonfavorable.