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All the energy released from the reaction XY, ΔrG=193 kJ.mol1 is used for oxidizing M+ as M+M3++2e,E=0.25V.
Under standard conditions, the number of moles of M+ oxidized when one mole of X is converted to Y is:
[F=96500 Cmol1]

Solution
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For the reaction M+M3++2e,, the standard Gibbs free energy change is
ΔG0=nFE0=2×96500×(0.25)=48250J/mol=48.25kJ/mol
The number of moles of M+ oxidized (when 1 mol of X is converted to Y) is 193kJ/mol48.25kJ/mol=4

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All the energy released from the reaction XY, ΔrG=193 kJ.mol1 is used for oxidizing M+ as M+M3++2e,E=0.25V.
Under standard conditions, the number of moles of M+ oxidized when one mole of X is converted to Y is:
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