Question
$2 \mathrm{NO}+2 \mathrm{H}_{2} \rightarrow \mathrm{N}_{2}+2 \mathrm{H}_{2} \mathrm{O}$
The above reaction has been studied at $800^{\circ} \mathrm{C}$. The related data are given in the table below
| Reaction serial number | Initial Pressure of ${H_2}/kPa$ | Initial Pressure of $NO/kPa$ | Initial rate $\left( {{{ - dp} \over {dt}}} \right)/(kPa/s)$ |
|---|---|---|---|
| 1 | 65.6 | 40.0 | 0.135 |
| 2 | 65.6 | 20.1 | 0.033 |
| 3 | 38.6 | 65.6 | 0.214 |
| 4 | 19.2 | 65.6 | 0.106 |
The order of the reaction with respect to NO is ___________.
Correct Answer
2