✦ LIBER ✦

Low-pressure thermal decomposition of ONBr and ONCl in shock waves

✍ Scribed by K. K. Maloney; H. B. Palmer

Publisher: John Wiley and Sons
Year: 1973
Tongue: English
Weight: 797 KB
Volume: 5
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550050611

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✦ Synopsis

Abstract

Rate constants for the low‐pressure unimolecular decomposition of ONBr and ONCl in an argon bath have been determined at temperatures in the vicinity of 1000°K. Both molecules exhibit the usual depression of the observed activation energy below the bond dissociation energy. The Arrhenius expressions obtained are (units of cc mole^−1^ sec^−1^):

Treatment of the data by the classical RRK theory yields s ≅ 2.7 ± 1 for ONCl and 3.0 ± 0.6 for ONBr. Coupling the shock tube results for ONCl with lower‐temperature data from Ashmore and Burnett [3], one obtains s ≅ 2.5 ± 0.5 and λ ≈︁ 1. If it is assumed that s is also 2.5 for ONBr, then one finds the surprising (but tentative) result that λ~ONClAr/λONBrAr~ ≈︁ 3 to 4.

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