## Spontaneous

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

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

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

Drew Myers 4G
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### Spontaneous

Can someone clarify how to prove when a reaction is spontaneous using Gibbs Free Energy?

805383532
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### Re: Spontaneous

A reaction is spontaneous when delta G is less than 0.

KHowe_1D
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### Re: Spontaneous

A reaction is spontaneous where deltaG is negative. When deltaG is positive the reaction is non spontaneous.

Kate Osborne 1H
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### Re: Spontaneous

A reaction is spontaneous when delta G is negative. for this to happen either delta H has to be negative, delta S has to be positive, or both are true. these factors creative spontaneity by driving the reaction either by enthalpy or entropy.

rabiasumar2E
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### Re: Spontaneous

A reaction is spontaneous when delta G is negative!

sarahartzell1A
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### Re: Spontaneous

When delta G is negative!

JonathanS 1H
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### Re: Spontaneous

If you use the G = H - TS, with a - H and + s, you will have a spontaneous reaction. If you have a +H and -S, the reaction will be non-spontaneous. If both are positive, the reaction will be spontaneous if TS is greater than H. If both are negative, the reaction will be spontaneous if H is greater than TS.

Hannah Pham
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### Re: Spontaneous

A spontaneous reaction has a delta G value that is negative (G<0)

Noe BM 1J
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### Re: Spontaneous

When delta G is negative, it's spontaneous. When delta G is positive.

TimVintsDis4L
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### Re: Spontaneous

When Delta G is negative, the reaction is exothermic. This means that it releases heat and does not require an input of energy; hence, it is spontaneous. An exothermic reaction indicates that an input of energy is required. This makes it a non-spontaneous reaction as it needs something else (not spontaneous) to make it do work.

BCaballero_4F
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### Re: Spontaneous

If delta G is negative then it is spontaneous, and if it is positive then it is not spontaneous.

rohun2H
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### Re: Spontaneous

If delta G is negative, the reaction is considered spontaneous (favorable).

Posts: 102
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### Re: Spontaneous

If gibbs free energy is less than zero, it is spontaneous. There is a chart in the book to correlate the two parts of gibbs free, the enthalpy and entropy part of the equation.

Jessica Katzman 4F
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### Re: Spontaneous

If delta G (the measure of Gibb's free energy) is positive, the reaction is not spontaneous. If it is negative, the reaction is spontaneous and therefore favorable.