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A study of the reaction NO3 + NO2 + M → N2O5 + M(M = N2, O2)

✍ Scribed by Timothy J. Wallington; Roger Atkinson; Arthur M. Winer; James N. Pitts Jr.

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
359 KB
Volume
19
Category
Article
ISSN
0538-8066

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✦ Synopsis

The gas-phase reaction of the NOa radical with NO, was investigated, using a flash photolysis-visible absorption technique, over the total pressure range 25-400 Torr of nitrogen or oxygen diluent a t 298 2 2 K. The absolute rate constants determined (in units of em3 molecule-' s-') a t 25, 100, and 400 Torr total pressure were, respectively, (4.0 2 0.5), 7.0 2 0.71, a n d ( l 0 2 2)forM = N2and(4.5 t 0.51, (8.0 i 0.41, and (8.8 2 2.0) for M = 02. These data show that the third-body efficiencies of N, and 0, are identical, within the error limits, and that previous evaluations for M = N, are applicable to the atmosphere. In addition, upper limits were determined for the rate constants of the reactions of the NO, radical with methanol, ethanol, and propan-2-01 of 5 6 x 5 9 X and 5 2 . 3 x cm3 molecule I s -' , respectively, a t 298 -t 2 K.

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