Thiobacillus thiooxidans plays an important role in the sulfur cycle in nature. The organism oxidizes inorganic sulfur compounds, and in the process, obtains energy for the synthesis of ATP. The oxidation of sulfite to sulfate:

(SO_{3} ^ { 2-} + 1/2 O_{2} --> SO_{4}^{2-})

a) Calculate %u2206E

b) Calculate %u2206G%u2019

c) Calculate the potential ATP yield at 40% efficiency of energy conservation under standard conditions.