Thermodynamic quantities in electrochemistry relation of AG to

The electrical work done by the ceU by virtue of a charge being passed can be expressed in two ways  

But the electrical work which is relevant to a thermodynamic analysis is the work done on the cell by virtue of the charge conveyed. 

In general, a charge of z faraday will pass if z is the stoichiometric coefficient for the electrons appearing in the equations for the electrode processes. 

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