Question

Multiple Choice/short answer Practice for Equilibrium

Write a short explanation for your choice of answer, although the explanation will not be graded neither will your answer be graded without one! Questions with a star (*) may have more than one correct answer. Report all correct answers.

Questions below refer to the following exothermic reaction

H2(g) + Cl2(g) + C(s) → CH2Cl2(g)

KP = 0.048

rate = (4.0 x 103s-1)[H2]

____________ 1. This reaction will
a. make a lot of product quickly

b. make very little product quickly

c. make a lot of product slowly

d. make very little product slowly

____________ 2. The KC value will be

a. 0.048

b. greater than 0.048

c. less than 0.048

3. What is the value of Kp for CH2Cl2(g) → H2(g) + Cl2(g) + C(s)

_____________ 4. If more carbon were added to the system at equilibrium, the concentration of hydrogen would
a. increase

b. decrease

c. stay the same

d. more information is needed to predict

_____________ 5. If chlorine was removed from the system at equilibrium, the concentration of hydrogen would

a. increase

b. decrease

c. stay the same

d. more information is needed to predict

______________ 6. If the reaction were conducted at a higher temperature, the concentration of hydrogen would

a. increase

b. decrease

c. stay the same

d. more information is needed to predict

7. If the reaction were conducted at a smaller volume, the concentration of hydrogen would

a. increase

b. decrease

c. stay the same

d. more information is needed to predict

8*. Changing which of the following will change the value of the equilibrium constant?

a. adding carbon
d. changing volume

b. removing chlorine

e. adding a catalyst

c. increasing temperature

__________ 9. The value of ΔG ̊ will be
a. positive

b. negative

c. greater than 1

d. less than 1

__________ 10. If 1.0 mol of each reactant and product were added to a 1.0 L flask, at equilibrium the concentration of dichloromethane will be

a. 1.0 M

b. greater than 1.0 M

c. less than 1.0 M

I would please like to know the explanations to all of the answers. Note that #8 has more than one right answer.