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In the button cells widely used in watCH...

In the button cells widely used in watCHMes and other devices the following reaction takes place :
`Zn(s)+Ag_(2)O(s)+H_(2)O(l) rarr Zn^(2+)(aq)+2Ag(s)+2OH^(c-)(aq)`
Determine `Delta_(r)G^(c-)` and `E^(c-)` for the reaction.

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