Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used in m
ID: 842734 • 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 453?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 743?C :
H2(g)+I2(g)?2HI(g)
Initially, only H2 and I2 were present at concentrations of [H2]=3.55M and [I2]=3.00M. The equilibrium concentration of I2 is 0.0100M . What is the equilibrium constant, Kc, for the reaction at this temperature?
Gas Partial Pressure(atm) CO 0.770 Cl2 1.28 COCl2 0.160
Explanation / Answer
CO(g)+Cl2(g)?COCl2(g)
Carbon monoxide and chlorine gas are allowed to react in a sealed vessel at 453?C . At equilibrium, the concentrations were measured and the following results obtained:
Gas
Partial Pressure
(atm)
CO
0.770
Cl2
1.28
COCl2
0.160
Since applying equilibrium condition
We have kp= pcocl2/pco*pcl2
= .16/.77*1.28
Kp=.162
H2(g)+I2(g)?2HI(g)
Initially 3.55 3 0
Finally (3.55-.01) (3-.01) .01
Kc= [HI]2/[H2][I2]
= .012/3.54*2.99
KC=9.44 X 10-6
Gas
Partial Pressure
(atm)
CO
0.770
Cl2
1.28
COCl2
0.160