In the button cells widely used in watches and other'devices the folfowing reaction takes place: (`Zn(s)+Ag_2 O(s)+H_2 O dotD Zn^2+(aq)+2 Ag(s)+ `2 OH` - (aq).) Determine `Delta_r G^circ` and `cdot E^circ` for the reaction.

Explanation

=0.344-(-0.76)=1.104 ~V
Delta_Gamma G^circ=-nFE^0
=-2 xx 96500 xx cdot 1.104
=-2.13 xx 10^5 ~J
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