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At 298 K the standard free energy of for...

At 298 K the standard free energy of formation of `H_(2)O(l)` is `-237.20 kJ/"mole"` while that of its ionisation into `H^(+)` ions and hydroxyl ions is `80kJ/"mole"`, then the emf of the following cell at 298 K will be :
[Take 1F = 96500 C]
`H_(2)O(g, 1 bar)|H^(+)(1M)||OH^(-)(1M) |O_92)(g, 1bar)`

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