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Calculate Δ G for the reaction 2 SO2 (g) + O2 (g) → 2 SO3 (g)...

Calculate Δ G for the reaction 2 SO2 (g) + O2 (g) → 2 SO3 (g) when P of SO2 = 0.500 atm, P of O2 = 0.0100 atm, and P of SO3 = 0.100 atm. The value for Δ G^o for this reaction at 298 K is -141.6 kJ.

ΔG = ???? kJ

I got -160.9 kj but it is incorrect.

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