Reaction of H atoms with N2Oat 374[ndash ]628 K
Abstract
The reaction of H atoms with N2O has been studied by flash photolysis in the temperature range 374–628 K at a pressure of 300 Torr, with argon as the bath gas. H atoms were generated by photolysis of NH3 and were monitored by Lyman-α absorption. At these temperatures the reaction is slow, and care was taken to establish conditions that ensured the measured rate constants were not affected by the occurrence of heterogeneous or secondary reactions. The values obtained are a factor of two less than those reported previously (Marshall etal., J. Chem. Phys., 1987, 86, 5540; J. Phys. Chem., 1989, 93, 1922) over this range of temperatures, and are given by