# 4.15 (6)   The experimental data for decomposition of   $N_2O_5 [2N_2O_5 \rightarrow 4NO_2 + O_2]$  in gas phase at 318K are given below:              Calculate the half-life period from k and compare it with (ii).

The half life produce = $0.693/k$
= $=0.693/4.82 \times 10^{-4}$
$1.438\times 10^{3} s$