1. ICE Problems

2. Calculating Kp from Pressure Data.
The reaction between atm NO and atm O2 to produce NO2 at 184o C was studied. At equilibrium, PO2 = atm.
Calculate Kp.

3. Equilibrium conc. from Kc or Kp.
The equilibrium between nitric oxide, oxygen, and nitrogen is described by the following equation:
2NO(g) ⇌ N2(g) + O2(g);
Kc = 2.3 x 1030 at 298 K. In the atmosphere, PO2 = atm and PN2 = atm. What is the equilibrium partial pressure of NO?

4. Calculating Equilibrium Pressures.
Assume that gaseous hydrogen iodide is synthesized from hydrogen gas and iodine vapor at a temperature where the equilibrium constant is 1.00 x102. Suppose HI at x10-1 atm, H2 at 1.000x10-2 atm, and I2 at x10-3 atm are mixed in a L flask. Calculate the equilibrium pressures of all species.

5. Determining Equilibrium Conc. from Initial Conc. and Kc.
2HI(g) ⇌ H2(g) + I2(s)
The decomposition of HI at room temperature was studied by injecting 2.50 mol HI into a L vessel at 25o C. What is [H2] at equilibrium for the above reaction where the equilibrium constant, Kc = 1.26 x10-3?

6. PCl5(g) ⇌ PCl3(g) + Cl2(g)
Kc = 4.2 x10-2
An inorganic chemist studying the reactions of phosphorus halides mixes mol PCl5 with mol Cl2 and mol PCl3 in a L flask at 250o C according to the above equation. In which direction will the reaction proceed?
What are the equilibrium concentrations of the other components?