Chem 220  CC #4        5 points            Name __________________________lab______

1. Write is the equilibrium expression, K, for the reaction

CaSO_3(s) ó CaO_(s) + SO_2(g) 

2. Which reaction would go the farthest to completion,

K= 1.00 E05 or K= 1.00 E-05?

3. Consider the equilibrium

  2 H₂O_{2 (g)}   ó  2 H₂O _(g) + O_{2  (g)}   DH = - 101 kJ    

Which way will the equilibrium shift for each of the following stresses?

1. Decrease the pressure by increasing the volume

2. Adding H₂O_{2 (g)}

3. Increasing the temperature

4. Removing O_{2 (g)}

4. Calculate the equilibrium constant for the following reaction given the following data. 

[NOCl]_i = 2.00M     [NO]_eq = .44M

2 NOCl  ó 2 NO  + Cl₂