Answer to Question #294057 in Chemistry for mehwish

Question

19. The equilibrium constant, Kc, for the dissociation of PCl5(g) is 4.2x10-2 at 250°C. How

many moles and grams of PCl5(g) must be added to a 3.0L flask to obtain a Cl2(g)

concentration of 0.15M?

PCl5(g) + Δ ⇄ PCl3(g) + Cl2(g) ΔH° = 92.5kJ

20. What is the Kp for the reaction in problem #19? What is the equilibrium partial

pressures of each of

the species in problem #19? What is the total pressure of the system in problem #19 at

equilibrium? What is the partial pressure of PCl5(g) before any of it decomposed?