The reaction of hydrogen and bromine behind reflected shock waves

Abstract

The reaction of equimolar mixtures of hydrogen and bromine diluted by inert gases was studied in the reflected shock zone over a temperature and total density range of 1400-2000 K and 1.5 X lO-6^^X 10"6 *mol cm"3, respectively. Infrared emission from HBr passing through a narrow interference filter centered at 3.60 pm was recorded during observation periods typically of 500-pa duration. Conversion of the emission intensity traces to concentration-time data revealed nonlinear product growth for the low-temperature runs and near-linear product profiles at the higher temperatures. The individual experimental profiles were matched with the corresponding model calculations which employed a modern set of rate constants for the various elementary reactions comprising the atomic mechanism. The average percent deviation of 62 experiments from the calculated profiles was 5.4%.