At 298K the standard free energy of formation of `H_2O ( l)` is -237.20 kJ/mole while that of its ionisation into `H^+`

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Q 2620756611.     At 298K the standard free energy of formation of `H_2O ( l)` is -237.20 kJ/mole while that of its ionisation into `H^+` ion and hydroxyl ions is 80 kJ/mole, then the emf of the following cell at 298 K will be (take F = 96500 C]

`H_2(g, 1 b ar) | H^+ (1M) || OH^- (1M) | O_2 (g, 1 ba r)`
A

0.40 V

B

0.81 V

C

1.23 V

D

-0. 40 V

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Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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