Thermodynamics of formation processes

The electrochemical reactions that proceed during the formation of positive plates can be represented by the following equations. Eh represents the equilibrium potential for the reaction at 298.15 K. 

All equilibrium potentials are referred to a standard hydrogen electrode. The Hg Hg2S04 electrode is widely used in lead-acid battery investigations. This electrode has a potential which is 0.620 V more positive than that of the standard hydrogen electrode at pH = 0 [18]. 

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