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Consider the gas-phase reaction, Cl 2 (g) + Br 2 (g) <=> 2 BrCl(g), for which K

ID: 944097 • Letter: C

Question

Consider the gas-phase reaction, Cl2(g) + Br2(g) <=> 2 BrCl(g), for which Kp = 32 at 500 K. If the mixture is analyzed and found to contain 0.45 bar of Cl2, 0.65 bar of Br2 and 3.1 bar of BrCl, describe the situation:

Q < K and more products will be made to reach equilibrium.

Q < K and more reactants will be made to reach equilibrium.

Within 1 decimal place, Q = K and the reaction is at equilibrium

Q > K and more products will be made to reach equilibrium.

Q > K and more reactants will be made to reach equilibrium.

1.

Q < K and more products will be made to reach equilibrium.

2.

Q < K and more reactants will be made to reach equilibrium.

3.

Within 1 decimal place, Q = K and the reaction is at equilibrium

4.

Q > K and more products will be made to reach equilibrium.

5.

Q > K and more reactants will be made to reach equilibrium.

Explanation / Answer

answer : 5. Q > K and more reactants will be made to reach equilibrium.

Cl2(g) + Br2(g) <=============> 2 BrCl(g)

0.45      0.65                                     3.1

Q = [BrCl]^2 / [Cl2][Br2]

    = 3.1^2 / 0.45 x 0.65

    = 32.85

Q = 32.86

Kp = 32

Q > K and more reactants will be made to reach equilibrium.