Chapter 11, Problem 76E

One of the concerns about the use of Freons is that they will migrate to the upper atmosphere, where chlorine atoms can be generated by the following reaction:

$\underset{Freon-12}{{\text{CCl}}_2{\text{F}}_{\text{2}}\left(g\right)}\stackrel{hv}{\to }{\text{CF}}_{\text{2}}\text{Cl}\left(g\right)+\text{Cl}\left(g\right)$

Chlorine atoms can act as a catalyst for the destruction of ozone. The activation energy for the reaction

Cl(g) + O₃(g) → ClO(g) + O₂(g)

Is 2.1 kJ/mol. Which is the more effective catalyst for the destruction of ozone, Cl or NO? (See Exercise 75.)