The experimental data for the decomposition of
`N_(2) O_(5) , [2N_(2) O_(5) to 4NO_(2) + O_(2)]`
in gas phase of 318 K are given below:

Find the half-life period for the reaction.

Explanation

Initial concentration
`[" at" t = 0]" of" N_(2) O_(5) = 1.63 xx 10^(-2)" M"`
Half of its concentration ` = (1.63 xx 10^(-2) )/( 2)`
`= 0.815 xx 10^(-2)" M"`
From, the above graph, the time which corresponds to `0.815 xx 10^(-2)` M concentration, is 1450 s.
Hence, `t_(1//2) = 1450` s