Question

Explain why Cu has a positive Eo value, if transform from Cu(s) to Cu2+(aq)​

Answer 1

The high energy required to transform Cu(s) to `Cu^(2+) (aq)` , i.e., sum of enthalpies of sublimation and ionization is not balanced by its hydration enthalpy . Hence, `E^(@) (Cu^(2+) //Cu) ` is positive.

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