P2 (g)  +  3Cl2 (g)  →  2PCl3 (g) If ΔGº at 298 K for the reaction is –642.9 kJ/mol, what is the value of ΔG at 298 K for a reaction mixture that consists of 1.1 atm P2, 1.05 atm Cl2, and 0.527 atm PCl3?

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