# Question

For the reaction PCl5(g) ⇌ PCl3(g) + Cl2(g) at 600. K, the equilibrium constant is 11.5. Suppose that 2.450 g of PCl5 is placed in an evacuated 500 mL bulb, which is then heated to 600. K.
a. What would the pressure of PCl5 be if it did not dissociate?
b. What is the partial pressure of PCl5 at equilibrium?
c. What is the total pressure in the bulb at equilibrium?
d. What is the degree of dissociation of PCl5 at equilibrium?

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