ch14_chemical kinetics

# ch14_chemical kinetics - 2 Cl 2 to decrease to 2.00 x 10-4...

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Chapter 14: Chemical Kinetics 1. Indicate how the rate of disappearance of each reactant is related to the rate of appearance of each product: a. H 2 (g) + I 2 (g) 2HI(g) b. N 2 (g) + 3H 2 (g) 2 NH 3 (g) 2. Given the following reaction 2NO 2 (g) + O 3 (g) N 2 O 5 (s) + O 2 (g) a. The rate law for this reaction is first order in both [NO 2 ] and [O 3 ]. Write the rate law for the reaction. b. If the rate constant is 3.0*10 -4 M -1 s -1 , calculate the rate of the reaction if [NO 2 ] = 0.26M and [O 3 ] = 0.080M. 3. In the reaction, A + B products, the following data was obtained at a certain temperature: [A] [B] Rate (M/s) 1.5 1.5 3.2 x 10 -1 1.5 2.5 3.2 x 10 -1 3.0 1.5 6.4 x 10 -1 a. Determine the rate law for the reaction. b. Calculate the rate constant.

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4. The decomposition of SO 2 Cl 2 SO 2 Cl 2 (g) SO 2 (g) + Cl 2 (g) is first order in SO 2 Cl 2 , and the reaction has a half-life of 245min at 600K. If you begin with 3.6 x 10 -3 mol of SO 2 Cl 2 in a 1.0L flask, how long will it take for the quantity of SO
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Unformatted text preview: 2 Cl 2 to decrease to 2.00 x 10-4 mol? 5. The decomposition of N 2 O 5 is a first-order reaction in N 2 O 5 . If the half-life for this reaction is 20 hours, what percent remains after 40 hours? 6. Explain how the half-lives of first-order and second-order reactions differ? 7. What three conditions must be met for a reaction to occur? 8. Why does an increase in temperature increase the rate of the reaction? 9. What is activation energy? 10. Most reaction-rate data obey an equation referred to as the Arrhenius equation. This equation is based on three factors. What are they? 11. What is a reaction intermediate? 12. Identify the intermediate(s) in the following mechanism. Cl 2 (g) ↔ 2Cl(g) (fast equilibrium) CHCl 3 (g) + Cl(g) → HCl(g) + CCl 3 (g) (slow step) CCl 3 (g) + Cl(g) → CCl 4 (g) (very fast step) 13. What is a catalyst?...
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## This note was uploaded on 06/06/2008 for the course CHM 116 taught by Professor ? during the Spring '08 term at Santa Monica.

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ch14_chemical kinetics - 2 Cl 2 to decrease to 2.00 x 10-4...

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