0.20 moles of phosphorus pentachloride were heated to 200°C in a 2 L container in the presence of a vanadium catalyst according to the following reaction.
\( \ce{PCl5(g) \rightleftharpoons PCl3(g) + Cl2(g)}\)
At equilibrium, the mixture was found to contain 0.16 moles of chlorine.
Which of the following is the equilibrium constant for this reaction at this temperature?
- 0.32
- 0.64
- 1.56
- 3.13