Electrolytic vs. Galvanic Cells

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Kahlo Baniadam 3F
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

Electrolytic vs. Galvanic Cells

Postby Kahlo Baniadam 3F » Thu Feb 04, 2016 4:18 pm

What are the main differences between an Electrolytic and a Galvanic cell?

Nivi Ahlawat 3I
Posts: 24
Joined: Fri Sep 25, 2015 3:00 am

Re: Electrolytic vs. Galvanic Cells

Postby Nivi Ahlawat 3I » Thu Feb 04, 2016 4:59 pm

Galvanic cells release energy, so they are exothermic. Gibbs free energy is negative, so the reaction is spontaneous. The cell potential difference is positive. E0 is positive.

Electrolytic cells require energy, so they are endothermic. Gibbs free energy is positive, so the reaction is not spontaneous; an external source of power is required. You can think of the electrons as going in the reverse direction — the direction opposite to the spontaneous direction. E0 is negative.

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