Consider the following data for the given reaction 2 HI_( g ) → H_2( g ) + I_2( g ) The order of the reaction is ____.

Consider the following data for the given reaction $$2 \mathrm{HI}_{(\mathrm{g})} \rightarrow \mathrm{H}_{2(\mathrm{~g})}+\mathrm{I}_{2(\mathrm{~g})} $$

	$\displaystyle 1$	$\displaystyle 2$	$\displaystyle 3$
$\displaystyle \mathrm{HI}\left(\mathrm{mol} \mathrm{L}^{-1}\right)$	$\displaystyle 0.005$	$\displaystyle 0.01$	$\displaystyle 0.02$
Rate ( $\displaystyle \mathrm{mol} \mathrm{L}^{-1} \mathrm{~s}^{-1}$ )	$\displaystyle 7.5 \times 10^{-4}$	$\displaystyle 3.0 \times 10^{-3}$	$\displaystyle 1.2 \times 10^{-2}$

The order of the reaction is $\displaystyle \_\_\_\_$.