Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used in m

Question

Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used in manufacturing certain dyes and plastics. Phosgene can be produced by reacting carbon monoxide and chlorine gas at high temperatures:

CO(g)+Cl2(g)COCl2(g)

Carbon monoxide and chlorine gas are allowed to react in a sealed vessel at 471 C . At equilibrium, the concentrations were measured and the following results obtained:

What is the equilibrium constant, Kp, of this reaction?

Explanation / Answer

The equilibrium constant is defined by

Kp = Partial pressure of Product / Partial pressure of Reactants

while applying this equation we need to take care of the stoichiometry.

Here in this question all the stoichiometry is 1

So, Kp = 0.220 / (0.830 * 1.11) = 0.220 / 0.921 = 0.239.

Thank You

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