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Kinetics study of the reaction HO + HNO 3
Author(s) -
Connell Peter S.,
Howard Carleton J.
Publication year - 1985
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550170104
Subject(s) - chemistry , torr , reaction rate constant , helium , work (physics) , analytical chemistry (journal) , kinetics , drift tube , tube (container) , limit (mathematics) , atomic physics , thermodynamics , physics , chromatography , organic chemistry , mechanical engineering , ion , quantum mechanics , engineering , mathematical analysis , mathematics
The reactionhas been studied using a discharge‐flow tube with resonant fluorescence detection of HO. Measurements of k 1 have been made at temperatures between 237 and 404 K. Our results and earlier work suggest that the rate constant has a minimum at T ≃ 500 K. Below room temperature our results are given by the expression k = (2.0 ± 0.4) × 10 −14 exp[(430 ± 60)/ T ] cm 3 molecule −1 s −1 , where the error limits include an estimate of the measurement accuracy. No dependence of k 1 on pressure at 300 K is observed in studies between 1‐ and 10‐torr helium. An upper limit of k b < 1% k 1 at 300 K is given.
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