Calculate delta G at 25 C for: Assume smallest whole-number coefficients.
a. MnO2 (s) + 4H + (aq) + 2I- (aq)----------------Mn 2+ (aq) + 2H20 + I2 (s)
b. H2 (g) + 2OH- (aq) + S(s) ---------------2H2O + S2- (aq)
c. an Ag-Ag+ half-cell and an Au-AuCl4- half cell
a. Eo = Ecathode - Eanode
= 1.23 - 0.535
= 0.695 V
dG = -nFEo
= -2 x 96485 x 0.695
= -134.11 kJ/mol
b. Eo = Ecathode - Eanode
= -0.48 - (-0.8277)
= 0.3477 V
dG = -nFEo
= -2 x 96485 x 0.3477
= -67.10 kJ/mol
c. Eo = Ecathode - Eanode
= 1.0 - 0.8
= 0.2 V
dG = -nFEo
= -3 x 96485 x 0.2
= -57.89 kJ/mol
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