Part A. Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is u

Question

Part A. 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 467?C . At equilibrium, the concentrations were measured and the following results obtained:

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

Part B.

The following reaction was performed in a sealed vessel at 722?C :

H2(g)+I2(g)?2HI(g)

Initially, only H2 and I2 were present at concentrations of [H2]=3.75M and [I2]=2.05M. The equilibrium concentration of I2 is 0.0400M . What is the equilibrium constant, Kc, for the reaction at this temperature?

Explanation / Answer

Step1 Kp =Pcocl2/PcoxPcl2 = .140/.840x1.16 =.144

QB Step1 I2 used in reaction = 2.55-.01=2.54M ; H2 used in reaction = 2.54M ;

Step2 At equalibrium [H2] = 4.00-2.54=1.46M ; [I2]=.01M ; [HI] =5.08M

Step3 Kc = 5.08x5.08/1.46x.01 = 1768

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