Express the equilibrium constant, K_c, for the following reaction. P(g) + 3/2 Cl

Question

Express the equilibrium constant, K_c, for the following reaction. P(g) + 3/2 Cl_2 (g) rightwardsharpoonoverleftwardsharpoon PCl_3 (g) A) K = [PCl_3]/[P]^2 [Cl_2]^3 B) K = [PCl_3]/[P][Cl_2]^3/2 C) K = [PCl_3]^1/2/[P]^1/2 [Cl_2]^1/3 D) k = [P][Cl_2]^3/2/[PCl_3] E) K = [p]^2 [Cl_2]^3/[PCl_3]^2 Consider the following reaction at equilibrium. What effect will removing H_2 O (by adding ethyl alcohol on the system? 2 H_2 S (g) + 3 O_2 (g) rightwardsharpoonoverleftwardsharpoon 2 H_2 O (g) + 2 SO_2 (g) A) No change will be observed. B) The reaction will shift to the left. C) The reaction will shift in the direction of products. D) The equilibrium constant will increase. E) The equilibrium constant will decrease. Consider the following reaction at equilibrium. What effect will increasing the temperature have on endothermic system? C_3 H_8 (g) + 5 O_2 (g) rightwardsharpoonoverleftwardsharpoon 3 CO_2 (g) + 4 H_2 O (l) + heat A) The reaction will shift to the left in the direction of reactants. B) The equilibrium constant will decrease. C) The reaction will shift to the right in the direction of products. D) The equilibrium constant will increase. E) No effect will be observed.

Explanation / Answer

12) option B is correct

Explanation: Equilibrium constant expression is the ratio of concentration terms of products to the concentration terms of reactants.

13) option C is correct

Explanation: removing H2O will shift the equilibrium in the direction of products in order to increase the deccreased amount of H2O.

14) option A is correct

Explanation: In endothermic reactions, an increase in temperature will shift the equilibrium in reverse direction that is in the direction of reactants.

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