7. Write a diagram of a galvanic cell in which the following chemical reaction occurs:
1/2 H2 1/2 Hg2Cl2 = HCl Hg.
Write an expression to calculate the emf of a given galvanic cell, the values of ΔH0 and ΔS0. Calculate the EMF using the values of standard electrode potentials and provide equations for electrode processes.

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