Rate coefficient for the reaction N + NO

Details Rate coefficient for the reaction N + NO Rate coefficient for the reaction N + NO

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....99.6273f&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. A4, p. 6273-6276

Physics

14

Chemical Reactions, Nitrogen, Nitrogen Oxides, Reaction Kinetics, Temperature Dependence, Thermosphere, Activation Energy, Mars Atmosphere, Temperature Distribution

Scientific paper

Evidence has been advanced that the rate coefficient for the reaction N + NO right arrow N2 + O has a small positive temperature dependence at the high temperatures (900 to 1500 K) that prevail in the terrestrial middle and upper thermosphere by Siskind and Rusch (1992), and at the low temperatures (100 to 200 K) of the Martian lower thermosphere by Fox (1993). Assuming that the rate coefficient recommended by the Jet Propulsion Laboratory evaluation (DeMore et al., 1992) is accurate at 300 K, we derive here the low temperature value of the activation energy for this reaction and thus the rate coefficient that best fits the Viking 1 measured NO densities. We find that the fit is acceptable for a rate coefficient of about 1.3 x 10(exp -10)(T/300)(exp 0.5)exp(-400/T) and better for a value of about 2.5 x 10(exp -10)(T/300)(exp 0.5)exp(-600/T)cu cm/s.

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