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Rate constants for the reaction of Cl atoms with O3 at temperatures from 298 to 184 K

Beach, S. D. and Smith, I. W. M. and Tuckett, R. P. (2002) Rate constants for the reaction of Cl atoms with O3 at temperatures from 298 to 184 K. International Journal of Chemical Kinetics, 34 (2). pp. 104-109. ISSN 0538-8066

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URL of Published Version: http://dx.doi.org/10.1002/kin.10033

Identification Number/DOI: doi:10.1002/kin.10033

Using the standard, low pressure, discharge-flow technique, with resonance fluorescence in the vacuum ultraviolet to observe Cl atoms, rate constants have been determined for the reaction of Cl atoms with O$$_3$$ at temperatures down to 184 K. The measured rate constants for 298-184 K fit the Arrhenius expression:

k(T) = (3.6 $$\pm$$ 0.7) $$\times$$ 10$$^{-11}$$ exp(( - 310 $$\pm$$ 50 K) / T) cm$$^3$$ molecule$$^{-1}$$ s$$^{-1}$$.

The results extend the data on this key atmospheric reaction to slightly lower temperatures. The data are in fairly good agreement with those currently in the literature but suggest that the rate constant approximately 15% lower than that given by currently recommended rate expressions at the lowest temperatures found in the stratosphere.

Type of Work: Article 2002 (Publication) Schools (1998 to 2008) > School of Chemical Sciences School of Chemistry QD Chemistry University of Birmingham John Wiley & Sons Inc. 752 YES

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