For the reaction $\begin{aligned} & 2 \mathrm{NO}_{(\mathrm{g})}+2 \mathrm{H}_{2(\mathrm{~g})}…
For the reaction
$\begin{aligned}
& 2 \mathrm{NO}_{(\mathrm{g})}+2 \mathrm{H}_{2(\mathrm{~g})} \longrightarrow \mathrm{N}_{2(\mathrm{~g})}+2 \mathrm{H}_2 \mathrm{O}_{(\mathrm{s})} \\
& \text { rate }=\mathrm{k}[\mathrm{NO}]^2\left[\mathrm{H}_2\right]
\end{aligned}$
What is the order of reaction with respect to $\mathrm{H}_2$ and overall order of reaction respectively?
0,2
1,3
2,1
3,1
Solution
$\text {Rate }=\mathrm{k}[\mathrm{NO}]^2\left[\mathrm{H}_2\right]$ Hence, the reaction is first order in $\mathrm{H}_2$.
$\therefore \quad$ Overall order of reaction $=2+1=3$