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The e.m.f. of the cell reaction Zn((s)...

The e.m.f. of the cell reaction
`Zn_((s)) + Cu_((aq))^(+2) to Zn_((aq))^(+2) + Cu_((s)) ` is 1.1 V. Calculate the free energy of the cell reaction. 

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`21KJ mol ^(-1)`
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