Spontaneity
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Spontaneity
If the cell potential of a battery is positive, does it mean that that Gibbs Free Energy would be negative too?
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Re: Spontaneity
Since both are directly correlated with the spontaneity of the reaction, and they are inversely related, then it makes sense that if one is positive, the other must be negative and vice versa.
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Re: Spontaneity
Correct. Negative Gibbs free energy and positive cell potential both mean that the reaction is spontaneous.
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Re: Spontaneity
Yes. From the equation ΔG∘=−nFEcell, you can see that if E.cell is positive, then the gibbs free energy would have to be negative, and if the change in gibbs free energy is negative, the reaction is spontaneous.
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Re: Spontaneity
Yes, if delta G is negative and cell potential is positive, it means the reaction is spontaneous.
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Re: Spontaneity
Yes, due to their inverse relationship in the equation -nFEcell, when the cell potential of the battery is positive, the
becomes negative
becomes negative
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Re: Spontaneity
Because Gibbs free energy and cell potential are inversely related, if the cell potential is positive, Gibbs free energy will be negative, therefore the reaction is spontaneous.
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Re: Spontaneity
Yes, Delta G = -nFEcell so if Ecell is positive Delta G must be negative and therefore spontaneous. Also keep in mind a negative delta G and positive Ecell means that the battery is working well.
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