1. Use the References to access important values if needed for this question The following
mechanism has been proposed for the conversion of ozone to oxygen in the gas phase. step :
03+O step 2: 03 + O-202 (a) Identify the molecularity of each step in the mechanism step 1 step
2 (b) Write the equation for the net reaction. Use the smallest integer coefficients possible. If a
box is not needed, leave it blank. (c) Identify any intemediates in this mechanism. Intermediate:
Enter formula. If none, leave box blank:
Solution
1)
a)
In step 1 there is only 1 reactant.
So, this is unimolecular
In step 2 there are 2 reactant.
So, this is bimolecular
Answer:
step 1: unimolecular
step 2: bimolecular
b)
The net reaction is obtained by adding both steps
After adding
O3 + O3 + O —> O2 + O + 2 O2
remove common molecules from both sides

2. 2 O3 —> 3 O2
c)
Intermediate is produced in 1st step and used up in next step
O is such intermediate
Anser: O
Only 1 question at a time please