Class 12 NEET Chemistry Electrochemistry Questions

The thermal efficiency,$\eta$ of a fuel conversion device is the amount of useful energy produced relative to the change in enthalpy, ΔH between the product and feed streams$\eta = \frac{\text {useful energy}}{\Delta H}$In an ideal case of an electrochemical convertor, such as a fuel cell, the change in Gibb’s free energy, ΔG of the reaction is available as useful electric energy at that temperature of the conversion.Hence $\eta_{\text {ideal}} = \frac{\Delta G}{\Delta H}$