1. The problem statement, all variables and given/known data Consider the charging of a lead-acid batter at atmospheric pressure and room room temperature. 2PbSO4 +2H2O -> Pb + PbO2 + 4H+ + 2SO42- How much electrical work must be provided to produce one mole of lead? 3. The attempt at a solution We're given the values of Gibbs Free Energy and Enthalpy for each of the reactants. I was doing a past paper for a uni exam and I came across that question. Now correct me if I'm wrong but isn't the electric work equal to the [tex]\Delta[/tex]G? So Welec = Gfinal - Ginitial? I'm fairly sure that's the case but the answer shows it calculated as W = Hfinal - Hinitial Again, correct me if I'm wrong but wouldn't that give compression/expansion work?