Phosgene (carbonyl chloride), C O C l 2 , is an extremely toxic gas that is used
ID: 828416 • Letter: P
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 453C . At equilibrium, the concentrations were measured and the following results obtained:
What is the equilibrium constant, Kp, of this reaction?
The following reaction was performed in a sealed vessel at 734?C :
H2(g)+I2(g)?2HI(g)
Initially, only H2 and I2 were present at concentrations of [H2]=3.25M and [I2]=2.40M. The equilibrium concentration of I2 is 0.0900M . What is the equilibrium constant, Kc, for the reaction at this temperature?
Gas Partial Pressure(atm) CO 0.700 Cl2 1.28 COCl2 0.140
Explanation / Answer
Kp= 0.140/(0.700*1.28) =0.15625
H2(g)+I2(g)-->2HI(g)
3.25 2.40 0
3.25-x 2.40-x 2x
2.40-x = 0.09
x=2.31
Kc= 4x^2/(0.94*0.09)=252.29787234