Kinetics of Hydrogen Halides in Shock Waves. IV. HBr

Abstract

Shock‐tube studies were made of the thermal dissociation rate of HBr in Ar over the 2100°–4200°K temperature range, using ir emission and uv absorption techniques. It was necessary to invoke a low activation energy (compared to bond energy) in order to explain the HBr dissociation data. The rate constant found for HBr dissociation by Ar was 10^12.19 exp($\text{−\hspace{0.17em}50 000/RT}$ cc/mole·sec. It was also found that HBr is about 15 times more efficient than Ar as a collision partner in dissociating HBr.