I. Valent et al., SIMULATIONS OF THE IODINE INTERPHASE TRANSPORT EFFECT ON THE OSCILLATING BRAY-LIEBHAFSKY REACTION, The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory, 102(39), 1998, pp. 7576-7579
The effect of the iodine interphase transport originated from physical
processes, such as pressure decrease, vigorous stirring, and/or an in
ert gas bubbling, on the dynamics of the oscillating Bray-Liebhafsky r
eaction is studied. Some new experiments were made at 60 degrees C tha
t confirmed the possibility of suppressing oscillations by means of th
e iodine vapor removal from the reaction solution. It has been proved
that the iodine vaporization is governed by the first-order kinetics w
ith respect to the concentration of aqueous iodine, and a critical rat
e constant for iodine escape causing inhibition of the oscillatory mod
e was determined. The experiments were confronted with the models prop
osed by Kolar-Anic and Schmitz with co-workers. Both the models studie
d reflect the observed phenomenon. A simulation based on the latest mo
del shows very good semiquantitative agreement with experiment, needin
g only a minor modification of the rate constants suggested by Kolar-A
nic et al.