Q. The Decomposition of N2O5 according to the equation 2 N2O5 (g) 4 NO2 (g) +O2 (g) is a first order reaction . After 30 min from start of decomposition in a closed vessel the total pressure developed is found to be 284.5 mm hg on complete decomposition the total pressure is 584.5 mm hg . Calculate the rate constant of the reaction (1) 2.6 05 10-3 min-1(2) 26.0510-3 min-1 (3) 2.605 10-2 min-1(4) 2.60510-4 min-1