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Rate constant measurements for the reaction of Cl atoms with nitric acid over the temperature range 240–300 K

✍ Scribed by Michael J. Kurylo; Jennifer L. Murphy; Geoffrey L. Knable

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
385 KB
Volume
94
Category
Article
ISSN
0009-2614

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✦ Synopsis

Rate constants for the reaction between Cl atoms and HOh'02 were measured at 243,264. and 198 I( by the flash photolysis resonance fluorescence technique_ The data can be fit to the Arrhenius expression R1 = 5.1 X lo-" esp(-1700/T) cm3 m01ecule~~ s-' snd indicate that the reaction is unimportanr in stratospheric Ci atom removal. Sources of measurement error in this and earlier stidues are discussed. chlorine_ For example, if we accept the Clark et al [S] room-temperature value for lit and an E/R value of -1100 K [of comparable magnirude to the E/R of reaction (2)]. we find that reaction (1) can play a modest role in HCI formation in the midstratosphere relative to Cl + CH, and Cl + HO, [ 1.21.

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