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ICE Problems

ICE Problems. Calculating K p from Pressure Data. The reaction between 1.000 atm NO and 1.000 atm O 2 to produce NO 2 at 184 C was studied. At equilibrium, P O2 = 0.506 atm. Calculate K p. Equilibrium conc. from K c or K p.

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ICE Problems

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  1. ICE Problems

  2. Calculating Kp from Pressure Data. • The reaction between 1.000 atm NO and 1.000 atm O2 to produce NO2at 184 C was studied. At equilibrium, PO2= 0.506 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 = 0.209 atmand PN2= 0.781 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 5.000 x10-1atm, H2 at 1.000x10-2atm, and I2 at 5.000 x10-3atm are mixed in a 5.000-L flask. Calculate the equilibrium pressures of all species.

  5. Determining Equilibrium Conc. from Initial Conc. and Kc. • The decomposition of HI at low temperature was studied by injecting 2.50 mol HI into a 10.32-L vessel at 25 C. What is [H2] at equilibrium for the reaction • 2HI(g) ⇌H2(g) + I2(s)? • Kc= 1.26 x10-3.

  6. Predicting Direction and Calculating Conc. • An inorganic chemist studying the reactions of phosphorus halides mixes 0.1050 mol PCl5 with 0.0450 mol Cl2 and 0.0450 mol PCl3 in a 0.5000-L flask at 250 C: • PCl5(g) ⇌ PCl3(g) + Cl2(g) • Kc= 4.2 x10-2 • In which direction will the reaction proceed? • If [PCl5] = 0.2065 M at equilibrium, what are the equilibrium concentrations of the other components?

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