Question

The decomposition of N₂O₅ according to the equation,

2N₂O₅(g)  → 4NO₂(g) + O₂(g)

is a first order reaction. After 30 min from the start of the decomposition in a closed vessel, the total pressure developed is found to be 284.5 mm of Hg. On complete decomposition, the total pressure is 584.5 mm of Hg. Calculate the rate constant of the reaction.

Answer 1

We know that 

No. of moles ∝ pressure developed