ozone

Question 1

What is the equation for the initiation step of the breakdown of the ozone layer using CF2Cl2 (chloroflouroalkanes)

Answer 1

CF2Cl2 → CF2Cl* + *Cl

Question 2

What are the 2 propogation steps for the breakdown of the ozone layer

Answer 2

Step 1: *Cl + O3 → *ClO + O2
Step 2: *ClO + O → *Cl + O2
or
Step 2: *ClO + O3 → *Cl + 2O2

(both step 2 can occur but the first one is named in the spec)

Question 3

What is the overall equation for the breakdown of the ozone layer

Answer 3

2O3 –> 3O2

Question 4

What is the overall equation for the breakdown and reforming of ozone

Answer 4

O2 + O <—> O3

(reversible reaction)

Question 5

What is the chlorine radical in the breakdown of the ozone layer

Answer 5

A very reactive intermediate

Question 6

Aside from chlorine radicals what else can catalyse the breakdown of the ozone layer

Answer 6

Nitrogen oxide radicals

Question 7

What are the propagation steps for the breakdown of the ozone layer using a NO radical

Answer 7

Step 1: NO* + O3 → NO2* + O2
Step 2: NO2* + O → NO* + O2