Chemistry - Electrochemistry Question with Solution | TestHub

Standard cell potential ($E_{cell}^{\circ }$) and standard electrode potential are intensive properties because they do not depend on the amount of substance present in the cell. Multiplying a half-reaction by a stoichiometric coefficient does not change its standard potential.

For a spontaneous cell reaction, the change in Gibbs free energy ($\Delta G$) must be negative.

Since $\Delta G^{\circ }=-RT\ln K$, for a spontaneous reaction under standard conditions ($\Delta G^{\circ }<0$), the equilibrium constant $K$ must be greater than $1$.

Thus, the statement that standard cell potential is an extensive property is false.

Answer: Standard cell potential of galvanic cell is an extensive property.