Spontaneity


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Chloe Alviz 1E
Posts: 102
Joined: Sat Aug 17, 2019 12:17 am

Spontaneity

Postby Chloe Alviz 1E » Sun Feb 23, 2020 8:37 pm

If the cell potential of a battery is positive, does it mean that that Gibbs Free Energy would be negative too?

205007651
Posts: 53
Joined: Tue Nov 13, 2018 12:17 am

Re: Spontaneity

Postby 205007651 » Sun Feb 23, 2020 8:40 pm

Yes your delta G will be negative based on the equation ΔG∘=−nFEcell

Sydney Myers 4I
Posts: 100
Joined: Fri Aug 09, 2019 12:17 am

Re: Spontaneity

Postby Sydney Myers 4I » Sun Feb 23, 2020 9:54 pm

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.

DanielTalebzadehShoushtari2A
Posts: 53
Joined: Fri Aug 02, 2019 12:16 am

Re: Spontaneity

Postby DanielTalebzadehShoushtari2A » Sun Feb 23, 2020 9:55 pm

Correct. Negative Gibbs free energy and positive cell potential both mean that the reaction is spontaneous.

RobertXu_2J
Posts: 104
Joined: Fri Aug 30, 2019 12:17 am

Re: Spontaneity

Postby RobertXu_2J » Sun Feb 23, 2020 10:01 pm

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.

Jacob Villar 2C
Posts: 105
Joined: Sat Aug 17, 2019 12:18 am

Re: Spontaneity

Postby Jacob Villar 2C » Sun Feb 23, 2020 10:04 pm

Yes, if delta G is negative and cell potential is positive, it means the reaction is spontaneous.

Emily Burghart 1k
Posts: 50
Joined: Wed Sep 18, 2019 12:17 am

Re: Spontaneity

Postby Emily Burghart 1k » Sun Feb 23, 2020 10:31 pm

Yes, due to their inverse relationship in the equation -nFEcell, when the cell potential of the battery is positive, the
becomes negative

CosetteBackus_4F
Posts: 23
Joined: Wed Feb 20, 2019 12:18 am

Re: Spontaneity

Postby CosetteBackus_4F » Mon Feb 24, 2020 2:33 pm

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.

ABombino_2J
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

Re: Spontaneity

Postby ABombino_2J » Tue Feb 25, 2020 3:01 pm

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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