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Kinetic study of the reaction of OH with HCl from 240–1055 K

✍ Scribed by A. R. Ravishankara; P. H. Wine; J. R. Wells; R. L. Thompson

Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
854 KB
Volume
17
Category
Article
ISSN
0538-8066

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✦ Synopsis

Absolute rate coefficients for the reaction of OH with HCl (k,) have been measured as a function of temperature over the range 240-1055 K. OH was produced by flash photolysis of HzO at A > 165 nm, 266 nm laser photolysis of O3/HZO mixtures, or 266 nm laser photolysis of HzOZ. OH was monitored by time-resolved resonance fluorescence or pulsed laser-induced fluorescence. In many experiments the HC1 concentration was measured in situ in the slow flow reactor by UV photometry. Over the temperature range 240-363 K the following Arrhenius expression is an adequate representation of t h e data: k 1 = (2.4 t 0.2) x lo-'' exp[-(327 t 28)/Tlcm3 molecule-' s-'. Over the wider temperature range 240-1055 K, the temperature dependence of kl deviates from the Arrhenius form, but is adequately described by the expression k l = 4.5 x exp(ll2/T) cm3 molecule-' s-'. The error in a calculated rate coefficient at any temperature is 208.

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