CH 223 – Ziegler KEY
KEYKEY
KEY CONCEPTS
CONCEPTS CONCEPTS
CONCEPTS Winter 08
Chapter 15 10th ed.
Class period 1 - Reading pp. 628 – 642
1. Explain what is equal when a chemical reaction is at equilibrium. Problem 15.1
2. Write the expression for K corresponding to a chemical equation. Problem 15.13
Class periods 2 - Reading pp. 643 –648
3. Calculate K, knowing
a. appropriate K’s for other reaction. Problem 15.22 a, b
b. all the equilibrium partial pressures. Problems 15.27, 15.30
c. all the initial and one equilibrium partial pressure. Problem 15.33
4. Use the value of K to determine
a. the direction of reaction. Problems 15.15, 15.38
b. equilibrium concentrations of all species. Problems 15.39, 15.44.
Class period 3 - Reading pp. 649 - 657
5. Apply Le Chatelier’s principle to predict the direction an equilibrium shifts when conditions
are changed. Problems 15.52, 15.56 b (use ∆H= -90.7 kJ), c, 15.73 a,c,d
6. Calculate the new equilibrium partial pressures that result when a system at equilibrium is
changed by addition or removal of a reactant or product. Problem 15.74
