In a typical fuel cell, the reactants (R) and products (P) are:
1. | R = H2(g), O2(g); P = H2O2(l) |
2. | R = H2(g), O2(g); P = H2O(l) |
3. | R = H2(g), O2(g), C l2(g); P = HClO4(aq) |
4. | R = H2(g), N2(g); P = NH3(aq) |
A device that converts the energy of combustion of fuels, like hydrogen and methane, directly into electrical energy is known as:
1. | Fuel cell. | 2. | Electrolytic cell. |
3. | Dynamo. | 4. | Ni-Cd cell. |