1.

In a hydrogen-oxygen fuel cell, combustion of hydrogen occurs to

Answer»

Produce high purity water
Create POTENTIAL difference between the TWO electrodes
Generate heat
Remove adsorbed oxygen from electrode surfaces

Solution :In hydrogen-oxygen fuel cell following reactions TAKE place to create potential difference between two electrodes.
`2H_(2(g))+4OH_((aq))^(-)to4H_(2)O_((l))+4e^(-)`
`underline(O_(2(g))+2H_(2)O_((l))+4e^(-)to4OH_((aq))^(-)"")`
Overall reaction=`2H_(2(g))+O_(2(g))to2H_(2)O_((l))`
the NET reaction is the same as burning (COMBUSTION) of hydrogen to form water.


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