For the gas-phase reaction 2SO2 + 02 2SO3, observed mole fractions for a certain equilibrium mixture at 1000 K and 732 torr are XSO2 = 0.7, XO2 = 0.05, and XSO3 = 0.03. Find A G° (KJ/mol) at 1000 K. O a. 27.16 O b. 82.31 O c. 40.11 O d. 33.54

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