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Ch.15 - Chemical Equilibrium

Chapter 15, Problem 162b

For the decomposition reaction PCl5(g) ⇌ PCl3(g) + Cl2(g), Kp = 381 at 600 K and Kc = 46.9 at 700 K. (b) If 1.25 g of PCl5 is introduced into an evacuated 0.500-L flask at 700 K and the decomposition reaction is allowed to reach equilibrium, what percent of the PCl5 will decompose and what will be the total pressure in the flask?

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