The standard electrode potential E^– and its $\left(\frac{d{E}^{\Theta }}{dT}\right)$ temperature coefficientfor a cell are 2 V and $-5\times 10^{-4}V{K}^{-1}$ at 300 K respectively. The cell reaction is $Zn\left(s\right)+C{u}^2\left(aq\right)\to Z{n}^{2+}\left(aq\right)+Cu\left(s\right)$ The standard reaction enthalpy $\left({\Delta }_r{H}^{\Theta }\right)$ at 300 K in kJ mol^–1 is, [Use R = 8 JK^–1 mol^–1 and F = 96,000 C mol^–1