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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.
- Spring '08