Question

answer both parts A&B

A Review Constants Periodic Table Part A Phosgene (carbonyl chloride). COCI, 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) = COCI(g) Carbon monoxide and chlorine gas are allowed to react in a sealed vessel at 464 °C. At equilibrium, the concentrations were measured and the following results obtained: Gas Partial Pressure (atm) 0.780 CO Cl2 COCI 1.25 0.140 What is the equilibrium constant, Kp. of this reaction? Express your answer numerically. View Available Hint(s) VO AER O a? K- Submit

Answer 1

The given equilibrium is CO + Cl2 <---------> COCI2 The equilibrium constant is given by K = Pcocia Рco xpсі, (0.140) (0.780)(1.25) K= 0.144 K = = 0.14359

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The balanced equation is H2+1 <---------> 2 HI Let x be the change in the concentration of each species at equilibrium. Kc M H z (g) + 12(8) = 2 H1 (g) Initial 3.95 2.40 change change -* -X -* -X +2x equilibrium 3.95 - X 2.40-X At equilibrium, [12] = 0.0200 M That is 2.40-X = 0.0200 So, x = 2.38 The equilibrium concentrations are [H2] = 3.95 – x = 3.95 – 2.38 = 1.57 M [12] = 0.0200 M [HI] = 2x = 2(2.38) = 4.76 M The equilibrium constant is given by [HI K = [HR][12] (4.762 Ka -= 721.5796 **(1.57)(0.0200) Kc = 721.6