Dinitrogen pentoxide rapidly decomposes in the atmosphere according to the reaction 2 N₂O5 (g) $\rightarrow$ 2 N₂O₄ (g) + O₂ (g).At a particular temperature, the slope of a plot of ln[N₂O₅] versus time in seconds is-0.00693.What is the half-life of this reaction if [N₂O5 ]0 = 1.20 M?

Question

Quizplus · Accepted Answer

The reaction follows first-order kinetics, and the half-life (t₁/₂) for a first-order reaction is given by t₁/₂ = 0.693/k. The slope of the plot is -0.00693, which is the negative of the rate constant k. Therefore, t₁/₂ = 0.693/0.00693 = 100 s.

Dinitrogen Pentoxide Rapidly Decomposes in the Atmosphere According to the Reaction