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What is a fuel cell? Write reaction at anode and cathode for H2-O2 fuel cell

Answer»

Fuel cell: The cells in which combustion energy of fuel directly get converted into electrical energy (also getting converted in any other form of energy viz. thermal energy, mechanical energy etc.) are known as fuel cell example – H2-O2 fuel cell, CH4-O2 fuel cell, NH2NH2-O2 fuel cell etc.
Reaction involving in H2-O2 fuel cell:
At anode – 2H2(g) + 4OH– (aq) → 4H2O(l) + 4e–
At cathode – O2(g) + 2H2O(l) + 4e– → 4OH– (aq)
Overall reaction – 2H2(g) + O2(g) → 2H2O (l)


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