93. Solving a chemistry problem

Indicate the order and find the rate constant of this reaction proceeding at a given temperature T, K, using the data (Table 6) on the course of the process in time τ (since the beginning of the reaction).
Reaction A solution of N2O5 in CCl4 decomposes with evolution of O2 a is the volume of O2, ml
Option 8
τ, hours 20 40 60 80 100 ∞
a 11.4 19.9 23.9 27.2 29.5 34.75
T,K 313.2