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The E^(Θ) (M^(2+)//M) value for copper i...

The `E^(Θ) (M^(2+)//M)` value for copper is positive (+0.34V). What is possible reason for this?

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(Hint): consider its higher `Delta_(a)H^(Θ) and " low" Delta_("hyd") H^(Θ)`)
The hydration enthalpy does not balance the energy required to transform `Cu_((s)) " to " Cu_((aq))^(2+)`. Also `Cu^(2+)` has high hydration and lattice enthalpy as compared to Cu.
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