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triangleH for the reactio Ag(s)+(1)/(2)H...

`triangleH` for the reactio `Ag(s)+(1)/(2)Hg_(2)Cl_(2)(s)toAgCo(s)+Hg(l)` is `+1280` cal at `25^(@)C` this reaction can be conducted in a cell for which the emf`=0.0455` volt at this temperature. Calculate the temperature coefficient of the emf.

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