What is Cell Potential?

The cell potential is a measure of the ability of the cell to do work and is related to the Gibbs free energy change (ΔG) of the electrochemical reaction. 

A positive cell potential indicates that the reaction is spontaneous and can generate electrical energy, while a negative cell potential indicates that the reaction is non-spontaneous and requires an external source of energy to occur.

The cell potential is an important parameter in many electrochemical processes, including batteries, fuel cells, and corrosion. 

It can be measured experimentally using a voltmeter and can be predicted theoretically using the Nernst equation, which relates the cell potential to the concentrations of the reactants and products involved in the electrochemical reaction.

The image discussed below shows the structure of the Galvanic Cell for which we find the cell potential is calculated.

Cell Potential is the difference in electrical potential between an electrochemical cell’s two electrodes. An electrochemical cell is a device that uses an electrochemical reaction to transform chemical energy into electrical energy. The differential in electron affinities between the two electrodes and the electrolytes’ reactivity are what cause the cell potential.
Electrons will move from the metal with lower electron affinity to the metal with higher electron affinity when two different metals are in contact, creating an electrical potential difference.