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The standard free energy of Cu((aq))^(+)...

The standard free energy of `Cu_((aq))^(+)`  is `50 kJ mol^(-1)` and that of `Cu_((aq))^(2+)` is `66 kJ. mol^(-1)`. Calculate the change in free energy for the reaction, `Cu_((aq))^(+) to Cu_((aq))^(2+) + e^(-)`. 

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Standard free energy change,
`DeltaG^@ = G_(Cu^(2+))^(@) - G_(Cu^(+))^(@)`
`= 66 kJ mol^(-1) - 50 kJ mol^(-1) = 16 kJ mol^(-1)`
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