What is a fuel cell ? How is it different from a conventional galvanic cell ?

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Detailed Solution

Fuel cell : The galvanic cell that converts energy of combustion of fuels like H₂ into electrical
energy is called a fuel cell.
Galvanic cell
1) efficiency of current is low
2) it is not a continuous source of energy
3) it is not pollution free
4) chemical energy of a spontaneous redox reaction is converted into the electrical energy
Fuel cell
1) efficiency of current is high
2) it is a continuous source of energy converts stored chemical energy into electrical energy (discharging) is called a secondary battery
Ex: lead -acid storage battery
3) it is pollution free
4) converts the energy from the combustion of fuels like H₂ into electrical energy