Reaction of hydrogen atoms with nitrous oxide

Abstract

The velocity constant of the reaction H + N₂O → N₂+ OH (22) has been obtained at 500°C by the addition of N₂O to slowly reacting mixtures of H₂+ O₂+ He and measurement of the relative rates of formation of N₂ and H₂O. The ratio k₂₂/k₂= 0.64 ± 0.07 gives k₂₂= 2.6 × 10⁶ l. mol^–1 s^–1, the error of ± 30–40% being largely due to the uncertainty in k₂. H + O₂→ OH + O. (2) Combination with other measurements gives the Arrhenius parameters A₂₂= 7.6 × 10¹⁰ l. mol^–1 s^–1, E₂₂= 15.1 ± 1.0 kcal mol^–1.