The number of 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 \( E_\text{cell}^{\circ} \) is dependent on the pressure
C \( \displaystyle \dfrac{\text{d}E^\ominus_{\text{cell}}}{\text{dT}} = \dfrac{\Delta_r S^\ominus}{nF} \)
D A cell is operating reversibly if the cell potential is exactly balanced by an opposing source of potential difference.
