Composite Reactions & the Steady State Approximation

DECOMPOSITION OF AZOMETHANE

Hint

For an elementary reaction of the form, aA + bB → cC,

[Rate of Elementary Reaction]

Example:

For the elementary reaction, O3 + NO → NO2 + O2
r = -d[O3]/dt = -d[NO]/dt = +d[NO2]/dt = + d[O2]/dt

r = k[O3]1[NO]1 = k[O3][NO]

Rate of Production of (Azomethane)* in the First Elementary Step {(+d[AZO*]/dt)1}

For the first elementary step

[Azomethane Mechanism (s1)]

the rate of production of (azomethane)* would be

+d[AZO*]/dt = ½k1[AZO]

+d[AZO*]/dt = k1[AZO]

+d[AZO*]/dt = k1[AZO]2

+d[AZO*]/dt = ½k1[AZO][AZO*]

+d[AZO*]/dt = k1[AZO][AZO*]