## Spontaneous Reaction

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

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

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

ng1D
Posts: 43
Joined: Wed Sep 18, 2019 12:17 am

### Spontaneous Reaction

How do you how Gibbs Free Energy change accompanying a process is related to the direction of a spontaneous reaction? Does it mean that when ∆G is negative, a reaction is spontaneous?

Shannon Asay 1C
Posts: 102
Joined: Fri Aug 09, 2019 12:16 am

### Re: Spontaneous Reaction

Yes, when delta G is negative, the reaction is spontaneous. Dr. Lavelle proved this today when he showed how the entropy of the universe would increase.

005324438
Posts: 51
Joined: Sat Aug 24, 2019 12:16 am

### Re: Spontaneous Reaction

Yes exactly, when ΔG is negative the reaction is favorable, and when it is positive it is unfavorable.

Shail Avasthi 2C
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Joined: Fri Aug 30, 2019 12:17 am

### Re: Spontaneous Reaction

When ΔG is negative, the reaction is spontaneous.

BritneyP- 2c
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Joined: Sat Sep 14, 2019 12:15 am

### Re: Spontaneous Reaction

Yes, when delta G is negative the reaction is spontaneous which is more favorable that when it is positive and not spontaneous.

Andres Merlos 2L
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Joined: Wed Sep 18, 2019 12:17 am

### Re: Spontaneous Reaction

Yes, when the deltaG is negative, this gives a spontaneous and more favorable reaction.

TimVintsDis4L
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Joined: Sat Aug 17, 2019 12:17 am

### Re: Spontaneous Reaction

By $\Delta G$ being Negative, we know that this is an exothermic reaction. As it is an exothermic reaction, we don't need and input of energy for it to proceed. As a result, the reaction is favorable and thus, spontaneous.

Noe BM 1J
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Joined: Sat Sep 07, 2019 12:17 am

### Re: Spontaneous Reaction

Can someone please explain how a negative delta G makes a reaction favorable?

005324438 wrote:Yes exactly, when ΔG is negative the reaction is favorable, and when it is positive it is unfavorable.

Justin Quan 4I
Posts: 104
Joined: Sat Sep 14, 2019 12:17 am

### Re: Spontaneous Reaction

When ∆G is negative, the reaction is spontaneous. When ∆G is positive, the reaction is non-spontaneous. The picture above helps organize how Gibbs free energy changes under different conditions.

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