The incorrect statements from the following is: A. The electrical work that a reaction can perform at constant pressure and temperature is equal to the reaction Gibbs energy. B. E cell ∘ is dependent on the pressure. C. dE cell ° dT = Δ r S ° nF D. A cell is operating reversibly if the cell potential is exactly balanced by an opposing source of potential difference.

Step-by-step solution

E cell ∘ is dependent on the equilibrium constant, K , which is not dependent on the pressure of any gas involved in the cell. Relation between Electrochemical Cell Potential and Gibbs free Energy change is given by; Δ   G   =   - nFE where Delta G is Gibbs Free energy change , n is the number of electrons involved in the reaction and F is Faraday and E is the Cell potential. We know that, dG = VdP - SdT At constant pressure dP = 0 ⇒ dG = - SdT S = - dG dT ∆ S = - ∆ dG dT