Question

Consider the following reaction where Kc = 83.3 at 500 K. PCl3(g) + Cl2(g) PCl5(g) A reaction mixture was found to contain 3.95×10-2 moles of PCl3(g), 3.87×10-2 moles of Cl2(g) and 9.77×10-2 moles of PCl5(g), in a 1.00 liter container. Is the reaction at equilibrium? If not, what direction must it run in order to reach equilibrium? The reaction quotient, Qc, equals . The reaction A. must run in the forward direction to reach equilibrium. B. must run in the reverse direction to reach equilibrium. C. is at equilibrium.