Ammonia gas (NH3) is heated to 300°C. a) At what total pressure is the mole fraction of N2 in the equilibrium gas mixture equal to 0.2? b) Calculate the standard enthalpy change and the standard entropy change for the reaction: 3/2 H2 (g) + 12 N2 (2>NH3 e) AG°(J) for 3H2 (2) + N2 (g)→ 2NH3(g) is –87030 + 25.8 T In T + 31.7 T

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