Chapter 13, Problem 13.38P

Interpretation Introduction

Interpretation:

The mechanism for catalytic destructions of ozone by chloride radicals is as follows:

(1)  $2\left[Cl + O{ }_3 \to O{ }_2 + ClO\right]$   Faster
(2) $2ClO \to C{l}_2{O}_2$             Slower, Rate Determining Step
(3) $C{l}_2{O}_2 + hv \to 2 Cl + O{ }_2$   Faster

Overall Reaction: $2O_3 + hv \to 3O{ }_2$

Draw a potential energy profile showing the destruction of ozone by the chlorine radical catalysed mechanism. The appropriate parts of the graph depicting reactants, products, catalysts, intermediates and activation energy $E_a$ should be labelled.

Concept Introduction:

Exothermic reactions are the chemical reactions in which energy is released in terms of heat and light. Chemically, exothermic reactions are represented as follows:

$Reactants \to Products + Energy$