Gibbs energy copper electrode

This equation gives the relation between the electrical potential difference between the copper wires attached to the electrodes when the cell is at equilibrium and the change of the Gibbs energy for the change of state that would take place in the cell if the cell were short-circuited. We point out here that the chemical potentials of electrons refer to 1 mole of electrons or 1 faraday of electricity. Therefore, A G refers to the change of state per faraday. If the change of state requires n faradays,... 

Daniell cell shown in Fig. 17.1, a zinc electrode is immersed in a solution of zinc sulfate and a copper electrode is immersed in a solution of copper sulfate the solutions are in electrical contact through a porous partition that prevents the solutions from mixing. The Daniell cell can produce electrical work which is related to the decrease in Gibbs energy, —AG, of the chemical reaction by relation (10.14). If the cell operates reversibly, then the electrical work produced is equal to the decrease in Gibbs energy. The performance of the electrochemical cell is discussed in detail in Chapter 17. 

The Gibbs energy of the cell reaction (Eq. (3.10)) can be calculated from the standard potential. For this calculation the following procedure is applied. The potential of the copper electrode (I) is referred to the potential of the hydrogen electrode (II). 

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