Name______________________________ Section/TA___________________

1. State Le Châtelier's principle

2. Write equilibrium expressions for the given chemical equilibria.

a) 2NOCl (g) --> 2NO (g) + Cl2 (g)

b) 3C2H2(g) --> C6H6 (l)

3. Calculate the equilibrium constant for the reaction

2NO (g) + O2 (g) --> 2NO2 (g)
(PNO = 1.0 atm, PO2 = 0.5 atm, PNO2 = 1.0 atm)

4. At a certain temperature, the value of the equilibrium constant for the reaction

CS2 (g) + 3O2(g) --> CO2(g) + 2SO2(g)

is K1. How is K1 related to the equilibrium constant K2 for the related equilibrium

1/3CS2 (g) + O2(g) --> 1/3CO2(g) + 2/3SO2(g)

at the same temperature?

5. For the given equilibrium

3NO(g)(colorless) --> N2O(g)(colorless) + NO2 (g)(brown) + heat

Predict your observation if
a) N2O (g) is added to the equilibrium mixture without change of volume or temperature

b) The volume of the equilibrium mixture is reduced at constant temperature

c) The equilibrium mixture is cooled

d) Gaseous argon is added to the equilibrium mixture without changing the volume