Chemistry - Electrochemistry Question with Solution | TestHub

${\epsilon }_{\mathrm{thermo}}=\frac{\Delta {\mathrm{G}}_{\mathrm{rxn}}}{\Delta {\mathrm{H}}_{\mathrm{rxn}}}=\frac{\text{ useful }\mathrm{E}}{\text{ total }\mathrm{E}}$. Related Theory Fuel cells are more efficient than thermal plants. The efficiency of fuel cells to produce electricity is $70\%$. Hydrogen-oxygen cell, methyl-oxygen-alcohol cell and propaneoxygen cell are some of the examples of fuel cells.