The efficiency of a fuel cell is given by:

The efficiency of a fuel cell is given by:
  1. $\frac{\Delta \mathrm{G}}{\Delta \mathrm{S}}$
  2. $\frac{\Delta \mathrm{G}}{\Delta \mathrm{H}}$
  3. $\frac{\Delta \mathrm{S}}{\Delta \mathrm{G}}$
  4. $\frac{\Delta \mathrm{H}}{\Delta \mathrm{G}}$

Solution

$\varepsilon_{\mathrm{thermo}}=\frac{\Delta \mathrm{G}_{\mathrm{rxn}}}{\Delta \mathrm{H}_{\mathrm{rxn}}}=\frac{\text { useful } \mathrm{E}}{\text { total } \mathrm{E}}$. 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.

Asked in: NEET 2007

Practice more Electrochemistry questions on Aicharya