List the two factors that influence the value of cell potential of a galvanic cell.

The potential difference between the two electrodes of a galvanic cell is called the cell potential and is measured in volts. The cell potential is the difference between the electrode potentials (reduction potentials) of the cathode and anode. It is called the cell electromotive force (emf) of the cell when no current is drawn through the cell.
The cell potential depends on many factors, including the nature of the oxidizing and reducing agents, the concentrations of the salt solutions in the half-cells, the temperature of the solutions, and the atmospheric pressure.