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Temperature Dependence of the Rate Coefficient of the Reaction OH + CF 3 CH 2 F over the Range 255‐424 K
Author(s) -
Leu GenHou,
Lee YuanPern
Publication year - 1994
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199400091
Subject(s) - chemistry , arrhenius equation , analytical chemistry (journal) , resonance fluorescence , temperature coefficient , atmospheric temperature range , excited state , fluorescence , resonance (particle physics) , molecule , nuclear magnetic resonance , activation energy , atomic physics , thermodynamics , chromatography , organic chemistry , quantum mechanics , physics
The rate coefficient of the reaction of OH with CF 3 CH 2 F at six temperatures in the range 255‐424 K was determined by means of the discharge‐flow/resonance‐fluorescence technique. The resonance fluorescence of OH, excited by emission from a gaseous mixture of H 2 O and He subjected to a microwave discharge, was detected by photon‐counting technique. The reaction was carried out under pseudo‐first‐order conditions with [CF 3 CH 2 F] >> [OH]; the rate coefficient was determined to be k = (3.9±0.6) × 10 −15 cm 3 molecule −1 s −1 at 298 K; the uncertainty represents the 95% confidence limit. The temperature dependence of the rate coefficient is expressed in the Arrhenius form, k(T) = (9.9±1.0) × 10 −13 exp [‐(1640±150)/T] cm 3 molecule −1 s 1 .