Ozone in the stratosphere can be depleted in catalyzed reactions. The overall reaction for this exothermic process is given by: O3 +O→2O2, via the mechanism: NO+O3 →NO2 +O2 NO2 +O→NO+O2 Is this mechanism a chain reaction? Why or why not? Identify both the catalyst and the reactive intermediate in this mechanism. Draw to a relative scale the potential energy vs. reaction coordinate diagram for both the uncatalyzed reaction and the catalyzed reaction. Label transition states, activation energy, and reactive intermediates where appropriate.

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter18: Chemical Kinetics
Section: Chapter Questions
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Ozone in the stratosphere can be depleted in catalyzed reactions. The overall reaction for this exothermic process is given by:

O3 +O→2O2, via the mechanism:

NO+O3 →NO2 +O2

NO2 +O→NO+O2

  1. Is this mechanism a chain reaction? Why or why not?

  2. Identify both the catalyst and the reactive intermediate in this mechanism.

  3. Draw to a relative scale the potential energy vs. reaction coordinate diagram for both the uncatalyzed reaction and the catalyzed reaction. Label transition states, activation energy, and reactive intermediates where appropriate.

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