Question

What drives a galvanic cell?

Answer 1

A galvanic cell is driven by the spontaneity of the chemical reaction occurring between the two compartments of the cell: Anode and Cathode.

Explanation:

A galvanic cell is driven by the spontaneity of the chemical reaction occurring between the two compartments of the cell: Anode and Cathode.

Note that the spontaneity of a reaction is either determined by its positive standard cell potential (`xi^@`) or its negative free energy (`DeltaG^@`).

Here are two videos that fully explain this topic.
Electrochemistry | The Galvanic Cell.

Electrochemistry | Cell Potential, Electrical Work & Free Energy.