The thermal dissociation of N2O5 in N2

Details The thermal dissociation of N2O5 in N2 The thermal dissociation of N2O5 in N2

Jul 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979georl...6..553c&link_type=abstract

Geophysical Research Letters, vol. 6, July 1979, p. 553-556.

Physics

2

Atmospheric Chemistry, Gas Dissociation, Nitrogen Oxides, Pyrolysis, Thermal Dissociation, Atmospheric Temperature, Gas Pressure, Night Sky, Reaction Kinetics, Stratosphere

Scientific paper

Measurements of the rate of thermal decomposition of di-nitrogen pentoxide in the presence of NO using infrared absorption by N2O5 as the monitoring technique are reported. This reaction is an example of unimolecular reaction kinetics catalyzed by inert gases, and exhibiting effects of non-equilibrium distributions over reacting energy states. Previous measurements of the limiting low-pressure second-order rate constant were confirmed and extended to lower temperatures. An estimate of the high-pressure first-order rate constant was found to be lower than the previous value at 300 K, and the high-pressure activation energy was larger than the previous estimate. A theoretical formula was derived which can be used approximately to extrapolate unimolecular reaction data to stratospheric conditions.

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