TABLE 1.

Summary of Gibbs free energy change in sulfur reactions^#.

Rct. No.	Chemical reaction	ΔG0′ (kJ)	ΔG0 at pH 10 (kJ)	References
1	Acetate– + 4S0 + 4H2O → 4HS– + 2HCO3– + 5H+	−6.6	−91.9	Oren, 2011
2	Acetate– + 4S4O62– + 4H2O → 2HCO3– + 9H+ + 8S2O32–	−233.4	−386.94	Thauer et al., 1977
3	Acetate– + SO42– → 2HCO3– + HS–	−47.3	−47.3	Thauer et al., 1977
4	4H2 + SO42– + H+ → HS– + 4H2O	−151.9	−134.84	Thauer et al., 1977

^#The ΔG values were calculated using acetate or hydrogen as samples and presented as the Gibbs free energy change per reaction. Eight electrons were transferred in every reaction.