CH-1758

Hydrogen fuel cells

Chemistry · Secondary 4 · Easy · Hydrogen fuel cells

In a hydrogen–oxygen fuel cell, hydrogen is supplied to the anode and oxygen to the cathode.

Which overall equation shows the reaction taking place in the cell?

$2H_2(g) + O_2(g) \rightarrow 2H_2O(l)$
$2H_2O(l) \rightarrow 2H_2(g) + O_2(g)$
$H_2(g) + O_2(g) \rightarrow H_2O_2(aq)$
$2H_2O(l) + O_2(g) \rightarrow 2H_2O_2(aq)$

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