Which reaction, when at equilibrium, would be unaffected by a change in pressure? A. N2(g) + O2 (g) = 2NO(g) B. 2CO(g) + O2 = 2CO2(g) C. COBr2(g) = CO(g) + Br2(g) D. N2O4(g) = 2NO2 (g)

Q: H,O() = H,0(g) AH = 41 kJ

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Q: KpKp

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A: The given reaction is PCl5(g) ⇌ PCl3(g) + Cl2(g) ΔH = 238 kJ/mol