Composite Reactions & the Steady State Approximation

DECOMPOSITION OF AZOMETHANE

Hint

Remember: When moving a term from one side of an equation to the other, the sign in front of it will change.

Example:

The equation
A + B - C = D
can be rewritten as
A - D = - B + C

Obtaining the Steady State Concentration of (Azomethane)* - Step 1

Applying the SSA to the rate of change of concentration of (azomethane)*, i.e. setting d[AZO*]/dt = 0, leads to the following expression:

0 = k1[AZO]2 - k-1[AZO][AZO*] - k2[AZO*]
This equation now needs to be simplified, to isolate [AZO*].

The first step in doing this is to move all terms that include [AZO*] to the left hand side of the equation.

This results in the following expression

- k-1[AZO][AZO*] - k2[AZO*] = k1[AZO]2

- k-1[AZO][AZO*] - k2[AZO*] = k1[AZO]2

- k-1[AZO][AZO*] + k2[AZO*] = k1[AZO]2

+ k-1[AZO][AZO*] - k2[AZO*] = k1[AZO]2

+ k-1[AZO][AZO*] + k2[AZO*] = k1[AZO]2