Below are the half reactions for sulfate reduction using acetate as a source of electrons, energy, and carbon.
2CO2 + 8e- -> CH3COO- (-0.29 volts)
SO42- + 8e- -> H2S (-0.22 volts)
Using the information given, calculate the ΔE for this reaction, balance the full reaction to determine n, the number of electrons transferred when 400 moles of SO42- are reduced. Finally, use the simplified Nernst Equation
ΔG = -nFΔE, where F = 96.5 kJ (mol e- × V)-1
to determine the Gibbs Free energy available to do work!
