Question 1: (1.5 points)

Any Approximation-Mechanism

Derive the rate law for the decomposition of O3 in the reaction:

203 (g)

302 (g)

Based on the mechanism:

03

ka

O₂+ O-

0+ 03-

ka'

Kb

02+ O

03

02+02/nQuestion 2: (3 points)

SAA approximation

Derive the rate law expression for the CCl4 production in the

photochemical reaction:

Cl₂ (g) + CHCl3 (g)

Based on the mechanism:

Cl₂ + light

CI+ CHC13

Cl₂+ CC13

Show that:

U = I₁

V=

k₂

k3

k4

2C1

d[CCl4]

dt

2CCl3 + Cl₂

2CC14

Apply steady-state approximation (SSA) on the two intermediates CC13

and Cl to derive the following expression for CCl4 production:

CCl4 (g) + HCl (g)

CC13 + HCI

CC14 + Cl

= 21₁ +

k√√[Cl₂]

√√K₁/non 3: (3.5 points)

Integration of rate law

gas-phase decomposition of acetic acid at 1189 K proceeds by way

two parallel reactions:

A → I,

k₁ = 3.74 s-¹

A➜ P,

k₂ = 4.65 s-¹

What is the maximum percentage yield (t = ∞o) of P obtainable at this

temperature?

Percent yield % = [P]/[A]. *100

Hint. Integrate the rate law expression for the formation of P, and then write an

expression for the percent yield of P in terms of ki, k2 and 1.