Temperature and pressure dependence of the rate constant for the HO2 + NO reaction

Title:
Temperature and pressure dependence of the rate constant for the HO2 + NO reaction
Authors:
Seeley, John V.; Meads, Roger F.; Elrod, Matthew J.; Molina, Mario J.
Abstract:
The rate constant for the reaction HO2 + NO → OH + NO2 has been measured using the turbulent flow technique with high-pressure chemical ionization mass spectrometry for the detection of reactants and products. At room temperature, the rate constant was found to be independent of pressure between 70 and 190 Torr of N2 and given by (8.0 ± 0.5) × 10-12 cm3 molecule-1 s-1. The temperature dependence of the rate constant was investigated between 206 and 295 K; the Arrhenius expression over this temperature range is (3.0 ± 0.4) × 10-12 exp[(290 ± 30)/T] cm3 molecule-1 s-1. The uncertainties of the room temperature rate constant and the Arrhenius parameters represent the precision of the data and are reported at the 1 standard deviation level. We estimate that possible systematic errors limit the accuracy of the determined rate constants to ±15%. Comparison of our data with the results of previous studies indicates that the rate constant for the HO2 + NO → OH + NO2 reaction does not depend on the inert gas pressure for 295 K ≥ T ≥ 206 K.
Citation:
Seeley, J.V., R.F. Meads, M.J. Elrod, and M.J. Molina. 1996. "Temperature and Pressure Dependence of the Rate Constant for the HO2 + NO Reaction." Journal of Physical Chemistry 100(10): 4026-4031.
Publisher:
American Chemical Society
DATE ISSUED:
1996-3-7
Department:
Chemistry
Type:
article
PUBLISHED VERSION:
10.1021/jp952553f
PERMANENT LINK:
http://hdl.handle.net/11282/309802

Full metadata record

DC FieldValue Language
dc.contributor.authorSeeley, John V.en_US
dc.contributor.authorMeads, Roger F.en_US
dc.contributor.authorElrod, Matthew J.en_US
dc.contributor.authorMolina, Mario J.en_US
dc.date.accessioned2013-12-23T16:18:12Zen
dc.date.available2013-12-23T16:18:12Zen
dc.date.issued1996-3-7en
dc.identifier.citationSeeley, J.V., R.F. Meads, M.J. Elrod, and M.J. Molina. 1996. "Temperature and Pressure Dependence of the Rate Constant for the HO2 + NO Reaction." Journal of Physical Chemistry 100(10): 4026-4031.en_US
dc.identifier.issn0022-3654en_US
dc.identifier.urihttp://hdl.handle.net/11282/309802en
dc.description.abstractThe rate constant for the reaction HO2 + NO → OH + NO2 has been measured using the turbulent flow technique with high-pressure chemical ionization mass spectrometry for the detection of reactants and products. At room temperature, the rate constant was found to be independent of pressure between 70 and 190 Torr of N2 and given by (8.0 ± 0.5) × 10-12 cm3 molecule-1 s-1. The temperature dependence of the rate constant was investigated between 206 and 295 K; the Arrhenius expression over this temperature range is (3.0 ± 0.4) × 10-12 exp[(290 ± 30)/T] cm3 molecule-1 s-1. The uncertainties of the room temperature rate constant and the Arrhenius parameters represent the precision of the data and are reported at the 1 standard deviation level. We estimate that possible systematic errors limit the accuracy of the determined rate constants to ±15%. Comparison of our data with the results of previous studies indicates that the rate constant for the HO2 + NO → OH + NO2 reaction does not depend on the inert gas pressure for 295 K ≥ T ≥ 206 K.en_US
dc.language.isoen_USen_US
dc.publisherAmerican Chemical Societyen_US
dc.identifier.doi10.1021/jp952553fen
dc.subject.departmentChemistryen_US
dc.titleTemperature and pressure dependence of the rate constant for the HO2 + NO reactionen_US
dc.typearticleen_US
dc.identifier.journalJournal of Physical Chemistryen_US
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