A student ran the following reaction in the laboratory at 591 K: COCI₂(g) →CO(g) + Cl₂(g) When he introduced COCI2(g) at a pressure of 0.994 atm into a 1.00 L evacuated container, he found the equilibrium partial pressure of COCI₂(g) to be 0.509 atm. Calculate the equilibrium constant, Kp, he obtained for this reaction.

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