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The chlorine radical then reacts with ozone as follows: sp sual Cl +O3 CIO + O2 CIO + O Cl + O2 -> The O atom is from the photochemical decomposi- tion of O, molecules. (a) Write the overall reaction for the last two steps. (b) What are the roles of Cl and ClO? (c) Why is the fluorine radical not important in this mechanism? (d) One suggestion to reduce the concentration of chlorine radicals is to add hydrocarbons such as eth- ane (C,H6) to the stratosphere. How will this work? (e) Draw potential energy versus reaction progress diagrams for the uncatalyzed and catalyzed (by Cl) destruction of ozone: O + 0 20,. Use the ther- modynamic data in Appendix 2 to determine whether the reaction is exothermic or endothermic. on 13.102 Chlorine oxide (CIO), which plays an important role in the depletion of ozone (see Problem 13.101), de- cays rapidly at room temperature according to the equation st- st he 2CIO(g) Cl,(g) + O2(g) -> sed ly: From the following data, determine the reaction or- der and calculate the rate constant of the reaction. Time (s) [CIO] (M) on. eis 0.12 x 10-3 8.49 x 10-6 9- 7.10 X 10 6 5.79 X 10-6 0.96 x 10-3 2.24 x 10 3 orm e in- fact olor 9- 3.20 x 10-3 4.00 x 10-3 5.20 x 10 6 4.77 x 10-6 13.103 A compound X undergoes two simultaneous first- order reactions as follows: X Y with rate con- stant k and X Z with rate constant k. The ratio of k lk, at 40°C is 8.0. What is the ratio at 300°C? Assume that the frequency factors of the two reac- lain tion rom per tions are the same.

The chlorine radical then reacts with ozone as follows: sp sual Cl +O3 CIO + O2 CIO + O Cl + O2 -> The O atom is from the photochemical decomposi- tion of O, molecules. (a) Write the overall reaction for the last two steps. (b) What are the roles of Cl and ClO? (c) Why is the fluorine radical not important in this mechanism? (d) One suggestion to reduce the concentration of chlorine radicals is to add hydrocarbons such as eth- ane (C,H6) to the stratosphere. How will this work? (e) Draw potential energy versus reaction progress diagrams for the uncatalyzed and catalyzed (by Cl) destruction of ozone: O + 0 20,. Use the ther- modynamic data in Appendix 2 to determine whether the reaction is exothermic or endothermic. on 13.102 Chlorine oxide (CIO), which plays an important role in the depletion of ozone (see Problem 13.101), de- cays rapidly at room temperature according to the equation st- st he 2CIO(g) Cl,(g) + O2(g) -> sed ly: From the following data, determine the reaction or- der and calculate the rate constant of the reaction. Time (s) [CIO] (M) on. eis 0.12 x 10-3 8.49 x 10-6 9- 7.10 X 10 6 5.79 X 10-6 0.96 x 10-3 2.24 x 10 3 orm e in- fact olor 9- 3.20 x 10-3 4.00 x 10-3 5.20 x 10 6 4.77 x 10-6 13.103 A compound X undergoes two simultaneous first- order reactions as follows: X Y with rate con- stant k and X Z with rate constant k. The ratio of k lk, at 40°C is 8.0. What is the ratio at 300°C? Assume that the frequency factors of the two reac- lain tion rom per tions are the same.

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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13.102

The chlorine radical then reacts with ozone as follows: sp sual Cl +O3 CIO + O2 CIO + O Cl + O2 -> The O atom is from the photochemical decomposi- tion of O, molecules. (a) Write the overall reaction for the last two steps. (b) What are the roles of Cl and ClO? (c) Why is the fluorine radical not important in this mechanism? (d) One suggestion to reduce the concentration of chlorine radicals is to add hydrocarbons such as eth- ane (C,H6) to the stratosphere. How will this work? (e) Draw potential energy versus reaction progress diagrams for the uncatalyzed and catalyzed (by Cl) destruction of ozone: O + 0 20,. Use the ther- modynamic data in Appendix 2 to determine whether the reaction is exothermic or endothermic. on 13.102 Chlorine oxide (CIO), which plays an important role in the depletion of ozone (see Problem 13.101), de- cays rapidly at room temperature according to the equation st- st he 2CIO(g) Cl,(g) + O2(g) -> sed ly: From the following data, determine the reaction or- der and calculate the rate constant of the reaction. Time (s) [CIO] (M) on. eis 0.12 x 10-3 8.49 x 10-6 9- 7.10 X 10 6 5.79 X 10-6 0.96 x 10-3 2.24 x 10 3 orm e in- fact olor 9- 3.20 x 10-3 4.00 x 10-3 5.20 x 10 6 4.77 x 10-6 13.103 A compound X undergoes two simultaneous first- order reactions as follows: X Y with rate con- stant k and X Z with rate constant k. The ratio of k lk, at 40°C is 8.0. What is the ratio at 300°C? Assume that the frequency factors of the two reac- lain tion rom per tions are the same.
Transcribed Image Text:The chlorine radical then reacts with ozone as follows: sp sual Cl +O3 CIO + O2 CIO + O Cl + O2 -> The O atom is from the photochemical decomposi- tion of O, molecules. (a) Write the overall reaction for the last two steps. (b) What are the roles of Cl and ClO? (c) Why is the fluorine radical not important in this mechanism? (d) One suggestion to reduce the concentration of chlorine radicals is to add hydrocarbons such as eth- ane (C,H6) to the stratosphere. How will this work? (e) Draw potential energy versus reaction progress diagrams for the uncatalyzed and catalyzed (by Cl) destruction of ozone: O + 0 20,. Use the ther- modynamic data in Appendix 2 to determine whether the reaction is exothermic or endothermic. on 13.102 Chlorine oxide (CIO), which plays an important role in the depletion of ozone (see Problem 13.101), de- cays rapidly at room temperature according to the equation st- st he 2CIO(g) Cl,(g) + O2(g) -> sed ly: From the following data, determine the reaction or- der and calculate the rate constant of the reaction. Time (s) [CIO] (M) on. eis 0.12 x 10-3 8.49 x 10-6 9- 7.10 X 10 6 5.79 X 10-6 0.96 x 10-3 2.24 x 10 3 orm e in- fact olor 9- 3.20 x 10-3 4.00 x 10-3 5.20 x 10 6 4.77 x 10-6 13.103 A compound X undergoes two simultaneous first- order reactions as follows: X Y with rate con- stant k and X Z with rate constant k. The ratio of k lk, at 40°C is 8.0. What is the ratio at 300°C? Assume that the frequency factors of the two reac- lain tion rom per tions are the same.
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