The Photochemical Decomposition of Chlorofluorocarbons
CCl₃F(g) $\rightarrow$ CCl₂F(g) + Cl(g)
Was Shown to Enhance the Decomposition of

question 34

Multiple Choice

The photochemical decomposition of chlorofluorocarbons
CCl₃F(g) $\rightarrow$ CCl₂F(g) + Cl(g)
Was shown to enhance the decomposition of ozone
2O₃(g) $\rightarrow$ 3O₂(g)
Leading to the formation of an ozone hole over the South Pole. In the following mechanism for the decomposition of ozone, characterize the products (ClO, O₂, and Cl) in each of the two steps.
Step 1: Cl + O₃ $\rightarrow$ ClO + O₂
Step 2: ClO + O₃ $\rightarrow$ Cl + 2O₂

• A) Cl is a catalyst, ClO is an intermediate, and O₂ is a reaction product.
• B) Cl is an intermediate, ClO is a catalyst, and O₂ is a reaction product.
• C) Cl and ClO are both catalysts, and O₂ is a reaction product.
• D) Cl, ClO, and O₂ are all intermediates.
• E) Cl is a catalyst, and ClO and O₂ are intermediates.

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