What noticable change marks the transition from the

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Unformatted text preview: wer plants or by neutralizing acidic lakes, streams, and soils. Forward Main Menu TOC Study Guide TOC Textbook Website MHHE Website 3 64 / Chemistry in the Atmosphere PRACTICE TEST 1. What noticable change marks the transition from the troposphere to the stratosphere? 2. a. Write out the steps in the mechanism by which ozone is formed in the stratosphere. b. What other naturally occurring molecule absorbs UV light in the stratosphere? 3. a. Write out the steps in the mechanism of ozone destruction by chlorine atoms. b. Identify the catalyst and the intermediate. 4. What does the abbreviation HCFC stand for? Write the formula of HCFC-123. 5. What is the greenhouse effect? 6. Name two ways in which deforestation contributes to the greenhouse effect that involve CO2 levels. 7. Give two sources of methane in the atmosphere. 8. By what means does Earth lose heat? 9. Write chemical equations that show what happens when acid rain reacts with iron and with limestone. 10. a. List three primary pollutants removed from automobile exhaust by catalytic converters. b. Explain briefly the role of each in the formation of smog. 11. The strength of the C—Cl bond in CF2 Cl 2 is 318 kJ/mol. What is the wavelength of a photon that has enough energy to break a C—Cl bond? Is this in the UV or visible region of the spectrum? 12. List three effects of acid rain. ANSWERS Exercises 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. Back Forming compounds from the element. N 2 (g) + O 2 (g) → 2NO(g) Troposphere, stratosphere, mesosphere, and ionosphere. The troposphere has constantly changing weather. + a. O* atoms b. N2 * ions a. the stratosphere b. 15–35 km 10 ppm 3O2 (g) → 2O3 (g) O2 (g) + h ν → 2O(g) O3 (g) + h ν → O2 (g) + O(g) CCl2 F 2 + h ν → C ClF 2 + C l CFC = chlorofluorocarbon. CF2 Cl 2 and CFCl 3 Chlorine monoxide An international agreement to limit CFC production. Combustion of a carbon compound. Respiration by animals and plants. Decompositon of dea...
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This note was uploaded on 09/15/2009 for the course CHEM 102 taught by Professor Bastos during the Spring '08 term at Adelphi.

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