Study of Chemical Reaction Mechanisms with Molecular Beams. The Reaction of K with HBr
- 1 September 1955
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 23 (9) , 1711-1718
- https://doi.org/10.1063/1.1742417
Abstract
The reaction between K and HBr has been studied by a molecular beam technique, using as a detector a surface ionization gauge with a tungsten and a platinum alloy filament, the former sensitive to KBr as well as to K and the latter essentially to K only. The activation energy is 3.4±0.1 kcal/mole and the probability or steric factor is about 0.1. The angular distribution of the KBr suggests that collisions with the H end of the HBr are more often fruitful than other configurations. The total collision cross section for a beam of K at 504°K in HBr at 401°K is 850×10—16 cm2.Keywords
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