Work done by an electrochemical cell is equal to the decrease in Gibbs energy
ΔGo = -nFEocell
An electrochemical cell is a device that can generate electrical energy from the chemical reactions occurring in it, or use the electrical energy supplied to it to facilitate chemical reactions in it. These devices are capable of converting chemical energy into electrical energy, or vice versa.
Relationship Between Gibbs Free Energy and EMF of a Cell
In the case of galvanic cells, Gibbs energy change ΔG is related to the electrical work done by the cell.
ΔG = -nFE(cell)
Where, n = number of moles of electrons involved
F = the Faraday constant
E = emf of the cell
F=1 Faraday =96500 coulombs
If reactants and products are in their standard states,