Spontaneous reactions

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Giselle Littleton 1F
Posts: 78
Joined: Wed Sep 18, 2019 12:20 am

Spontaneous reactions

Postby Giselle Littleton 1F » Fri Feb 28, 2020 10:26 am

Does the chemical reaction being spontaneous increase or decrease cell potential?

Sarah Blake-2I
Posts: 153
Joined: Fri Aug 30, 2019 12:16 am

Re: Spontaneous reactions

Postby Sarah Blake-2I » Fri Feb 28, 2020 10:28 pm

I am not quite sure that the reaction being spontaneous increases or decreases cell potential, but I do know that if Ecell is positive, that indicates a spontaneous process. So the value of Ecell determines spontaneity not the other way around.

WYacob_2C
Posts: 102
Joined: Sat Jul 20, 2019 12:16 am

Re: Spontaneous reactions

Postby WYacob_2C » Sat Feb 29, 2020 12:28 am

When the cell potential is positive, the reaction is spontaneous. When you are given the standard cell potentials of different reduction reactions, typically the more positive value is more spontaneous, and therefore the reduction reaction.

Brian J Cheng 1I
Posts: 115
Joined: Thu Jul 11, 2019 12:15 am

Re: Spontaneous reactions

Postby Brian J Cheng 1I » Sat Feb 29, 2020 12:29 pm

Spontaneous reactions have positive cell potentials, so going off of this logic it technically contributes to a "higher" net cell potential. But as Sarah said the E cell value should determine spontaneity, not the other way.

Bryce Barbee
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am

Re: Spontaneous reactions

Postby Bryce Barbee » Sat Feb 29, 2020 12:38 pm

I don't think that cell potential is affected or based on the spontaneity of the reaction but I might be wrong. The cell potential is based on the difference between potentials of the products and reactants.

Minh Ngo 4G
Posts: 137
Joined: Thu Jul 25, 2019 12:17 am

Re: Spontaneous reactions

Postby Minh Ngo 4G » Sat Feb 29, 2020 1:56 pm

It doesn't affect but a positive cell potential means a negative Gibbs free energy which mean spontaneous

SimranSangha4I
Posts: 99
Joined: Sat Sep 14, 2019 12:17 am

Re: Spontaneous reactions

Postby SimranSangha4I » Sat Feb 29, 2020 3:05 pm

When the cell is positive, the reaction is spontaneous, which also means there's a negative Gibbs free energy.


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