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 468 ∘C . At equilibrium, the concentrations were measured and the following results obtained: Gas Partial Pressure (atm) CO 0.720 Cl2 1.14 COCl2 0.170 What is the equilibrium constant, Kp, of this reaction?

Answer 1

Answer : The value equilibrium constant for the reaction is, 0.207

Explanation :

The given chemical reaction:

$CO(g)+Cl_2(g)\rightleftharpoons COCl_2(g)$

The expression of $K_p$ for above reaction follows:

$K_p=\frac{P_{COCl_2}}{P_{CO}\times P_{Cl_2}}$

We are given:

$P_{COCl_2}=0.170atm$

$P_{CO}=0.720atm$

$P_{Cl_2}=1.14atm$

Putting values in above equation, we get:

$K_p=\frac{0.170}{0.720\times 1.14}\\\\K_p=0.207$

Thus, the value equilibrium constant for the reaction is, 0.207