Question

4. The dissociation of NO2 occurs by the following reaction: 2NO2(g) → 2NO(g) + O2(g) If the rate for the reaction is 0.83 M sl, i. Write the differential rate expression for the above reaction. ii. Determine the rate of disappearance of NO2. [4M]

Answer 1

a. This can be gotten from the equation of reaction. An easy way about this is always consider the reactant dissipating and carries a negative sign while the foward reaction carries the postive sign since products is formed.

The differential rate of the reaction can be written as

`-(1)/(2)(d)/(dt)\lbrack NO_2\rbrack=-(1)/(2)\lbrack NO\rbrack=(d)/(dt)\lbrack O_2\rbrack`

b.

But the rate ofthe reaction is

`\begin{gathered} r=k\lbrack NO_2\rbrack^2 \\ r=0.83Ms^(-1) \end{gathered}`

Now, let's bring the differential equation back