Question

The composition of N₂O₅ follows first-order kinetics based on the reaction below.

2N₂O₅ (g) → O₂ (g) + 4NO₂ (g)

The rate constant of the reaction at 25℃ is 3.46 × 10^3/s. How long (in seconds) would it take for an initial concentration of 0.050 M to decrease to 0.015 M? What is the half-life of the reaction?

Answer 1

Change in concentration = $0.050- 0.015= 0.035M$

$T = \frac{0.035}{3.46×10^{3}}=1.12×10^{-5} sec$