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Calculate DeltaG^(@) for the given react...

Calculate `DeltaG^(@)` for the given reaction occuring fuel cell
(i) `O_(2) + 4H^(+) + 4e^(-) to 2H_(2)O, E^(@) = 1.229` volt
(ii) `2H_(2) to 4H^(+) + 4e^(-) ,E^(@) = 0` volt

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`E_(cell)^(@)=E_(O_(2)//H_(2)O)^(@)(Red)+E_(H_(2)//H^(+))^(@)(Ox)=1.229+0=1.229V`
`DeltaG=-nFE_(cell)^(@)=-4xx96500xx1.229J=-474.4kJ`.
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