Spontaneous






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Drew Myers 4G
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Spontaneous

Postby Drew Myers 4G » Sun Feb 16, 2020 8:11 pm

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

805383532
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Re: Spontaneous

Postby 805383532 » Sun Feb 16, 2020 8:14 pm

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

KHowe_1D
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Re: Spontaneous

Postby KHowe_1D » Sun Feb 16, 2020 8:14 pm

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

Postby Kate Osborne 1H » Sun Feb 16, 2020 8:15 pm

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

Postby rabiasumar2E » Sun Feb 16, 2020 8:17 pm

A reaction is spontaneous when delta G is negative!

sarahartzell1A
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Re: Spontaneous

Postby sarahartzell1A » Sun Feb 16, 2020 8:18 pm

When delta G is negative!

JonathanS 1H
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Re: Spontaneous

Postby JonathanS 1H » Sun Feb 16, 2020 8:18 pm

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

Postby Hannah Pham » Sun Feb 16, 2020 8:19 pm

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

Noe BM 1J
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Re: Spontaneous

Postby Noe BM 1J » Sun Feb 16, 2020 8:26 pm

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

TimVintsDis4L
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Re: Spontaneous

Postby TimVintsDis4L » Sun Feb 16, 2020 8:28 pm

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

Postby BCaballero_4F » Sun Feb 16, 2020 8:37 pm

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

Postby rohun2H » Sun Feb 16, 2020 8:39 pm

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

Madelyn Romberg 1H
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Re: Spontaneous

Postby Madelyn Romberg 1H » Sun Feb 16, 2020 8:41 pm

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

Postby Jessica Katzman 4F » Sun Feb 16, 2020 9:00 pm

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.


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