Consider the reaction shown below. Comment on the changes in the concentrations

Question

Consider the reaction shown below.

Comment on the changes in the concentrations of SO2, O2, and SO3 at equilibrium if we were to make the following changes. (Select all that apply.)

(a) increasing the temperature

Concentration of O2 will decrease.It favors the endothermic reaction.It favors the exothermic reaction.Concentration of SO2 will increase.Concentration of O2 will increase.Concentration of SO3 will increase.Concentration of SO3 will decrease.Concentration of SO2 will decrease.

(b) increasing the pressure

Concentration of SO3 will decrease.It favors the reaction that increases the number of moles of gas.It favors the reaction that decreases the number of moles of gas.Concentration of SO3 will increase.

(c) increasing SO2 concentration

It will lead to an increase in the concentration of SO3.It will lead to an decrease in the concentration of SO3.It will lead to an increase of O2.It will lead to a decrease in the concentration of O2.

(d) adding a catalyst

It has no effect on the position of the equilibrium.The equilibrium will shift to the right.     The equilibrium will shift to the left.

(e) adding helium at constant volume

It has no effect on the position of the equilibrium.The equilibrium will shift to the right.     The equilibrium will shift to the left.

Consider the reaction shown below. 2 SO2(g) + O2(g) 2 SO3(g) H A degree = -198.2 kJ/mol Comment on the changes in the concentrations of SO2, O2, and SO3 at equilibrium if we were to make the following changes. (Select all that apply.) (a) increasing the temperature Concentration of O2 will decrease.It favors the endothermic reaction.It favors the exothermic reaction.Concentration of SO2 will increase.Concentration of O2 will increase.Concentration of SO3 will increase.Concentration of SO3 will decrease.Concentration of SO2 will decrease. (b) increasing the pressure Concentration of SO3 will decrease.It favors the reaction that increases the number of moles of gas.It favors the reaction that decreases the number of moles of gas.Concentration of SO3 will increase. (c) increasing SO2 concentration It will lead to an increase in the concentration of SO3.It will lead to an decrease in the concentration of SO3.It will lead to an increase of O2.It will lead to a decrease in the concentration of O2. (d) adding a catalyst It has no effect on the position of the equilibrium.The equilibrium will shift to the right. The equilibrium will shift to the left. (e) adding helium at constant volume It has no effect on the position of the equilibrium.The equilibrium will shift to the right. The equilibrium will shift to the left.

Explanation / Answer

a) It favors the exothermic reaction.Concentration of SO2 will increase.Concentration of O2 will increase.Concentration of SO3 will decrease..

b) It favors the reaction that decreases the number of moles of gas.Concentration of SO3 will increase.

c) It will lead to an increase in the concentration of SO3

It will lead to a decrease in the concentration of O2.

d) It has no effect on the position of the equilibrium.

e) It has no effect on the position of the equilibrium

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