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Second law of thermodynamics is not a restriction in the working of a fuel cell. Explain. |
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Answer» Solution :Convential method of converting chemical energy into ELECTRICAL energy INVOLVES three steps Step I: Chemical energy `rarr` Heat energy Step II : Heat energy `rarr` Mechanical energy Step III : Mechanical energy `rarr` Electrical energy The extent of heat CONVERTED into mechanical energy (step II) is limited by the second law of thermodynamics . Hence, the power plants are with only 40% efficiency. But in a fuel CELL, chemical energy is directly converted into electrical energy, with a theoretical 100% efficiency. |
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