Thermodynamic quantities in electrochemistry effect of temperature on emf

Study of the dependence of the emf on temperature will give further thermodynamic quantities. For processes occurring reversibly in a closed system (Section 8.7, Equation 8.14)  

Hence the change in entropy for the cell reaction of a reversible cell can be found from the variation of the emf with temperamre. 

If A5 and AH are assumed to be independent of temperature then so will dEf /dT) also be independent of temperature and a simple difference of the values can be taken. 

The cell reaction as written corresponded to z = 2. If, instead, the electrode reactions were written as  

As will become apparent from many of the following problems there are two aspects of solving problems which, if understood and assimilated, make formulation of the equation relating the emf of a cell to the activities/concentrations and/or partial pressures a straightforward procedure. They are  

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