On the Hydrogenmdash;Bromine Reaction Rate in a Nonsteady State

摘要

The deviations of atom concentrations and overhyphen;all rate from steadyhyphen;state conditions for the H2sngbnd;Br2reaction are evaluated as functions of the extent of reaction in a temperature range 1000deg;mdash;1600deg;K. Both the concentration and rate deviations are serious at 1400deg;mdash;1600deg;K. The major source of the nonsteady state deviation in rate is the reactionk5HBr2 and the regenerating cycle proceeds in nonsteady state except at the later stage of the reaction. A previously obtained result that two atom concentration deviations egr;1and egr;2are nearly identical is equivalent to the condition that the rate of change of the Hhyphen;atom concentration vanishes. At elevated temperatures, analysis of the atom concentration deviations alone does not give sufficient information for the evaluation of the steadyhyphen;state hypothesis; the overhyphen;all rate deviation must be obtained to answer the question of steadyhyphen;state validity.