Example 22.3 Analysing a first-order reaction The variation in the partial pressure of azomethane with time was followed at 600 K, with the results given below. Confirm that the decomposition CH3N2CH3(g) → CH3CH3(g) + N2(g) is first-order in azomethane, and find the rate constant at 600 K. t/s 0 1000 2000 3000 4000 p/Pa 10.9 7.63 5.32 3.71 2.59