CHM 2046C Module 10 Sample Exam

Part I: Discussion Questions 10 points

Answer five of the following:

1. What is dynamic equilibrium?

2. What is true about the initial rate of the forward and reverse reactions in a system where only reactants are present?

3. a. What is true about the rates of the forward and reverse reactions at equilibrium?

b. What happens to the value of K when the reaction is reversed?

c. What happens to the value of K when the temperature is changed for the reaction?

4. Your textbook introduces the concept of equilibrium by noting that no reaction goes fully to completion. What does this imply about the reverse reaction?

5. Discuss the relationship between the magnitude of the equilibrium constants as to whether the forward or the reverse reaction is favored.

6. What effect does adding a catalyst on the concentrations of the reactants and products after equilibrium is established.

7. What disturbances are possible for a system in equilibrium?

8. When is it reasonable to neglect the change in the concentration in the denominator of an equilibrium constant expression when solving for the equilibrium concentrations from the initial concentrations.. (When does 1.0 M – x ~ 1.0)