Question

For the decomposition of azomethane, CH₃N₂CH₃(g) → CH₃CH₃(g) + N2(g), a first-order reaction, the variation in partial pressure with time at 600 K is given as
The half-life of the reaction is ______ × 10^–5s. [Nearest integer]

Answer 1

Correct Answer: 2

For first-order reaction
k=\(\frac{1}{t}\) ln \(\frac{P_0}{P}\)
ln ⁡\(\frac{P_0}{P}\)=kt 
t\(_{\frac{1}{2}}\)=ln\(\frac{2}{k}\)=\(\frac{0.693}{3.465}\)×10⁴=2×10⁻⁵ s