Phosphorus trichloride gas and chlorine gas react to form phosphorus pentachloride gas: PCl3(g)+Cl2(g)⇌PCl5(g) A 7.5-L gas vessel is charged with a mixture of PCl3(g) and Cl2(g), which is allowed to equilibrate at 450 K. At equilibrium the partial pressures of the three gases are PPCl3 = 0.122 atm, PCl2 = 0.153 atm ,and PPCl5 = 1.90 atm .   A. What is the value of Kp at this temperature? (Express your answer using three significant figures.)   B. Does the equilibrium favor reactants or products?   C. Calculate Kc for this reaction at 450 K. (Express your answer using two significant figures.)

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