Volume 5, Issue 1

Thermodynamics of electrochemical reactions in Lead-acid Battery

Adebayo Akinbulu1, and Toafeek Ogunbayo2
1University Of Lagos, NIGERIA, and 2University Of Lagos, NIGERIA


Thermodynamics of the electrochemical reaction in lead-acid battery was investigated. A negative value of change in Gibbs’ free energy, ?G, and a positive entropy change, ?S, were obtained for the reaction. ?G was more negative at increased temperature. The reaction was exothermic, with a negative value of enthalpy change, ?H. A relatively small value of temperature coefficient of the electromotive force of the cell, (?E/?T)_P, was also obtained for the reaction.

Keywords: Thermodynamics, Temperature coefficient, and Lead-acid battery

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