COLL 347 |
| J.P. Devlin, Department of Chemistry, Oklahoma State University, Stillwater, OK 74078 and V. Buch, Fritz Haber Institute for Molecular Dynamics, Hebrew University, 91904 Jerusalem, Israel. |
| After a brief review of the behavior of submonolayer quantities of HCl and HBr on the surface of ice nanocrystals in the 50 – 100 K range, attention will be directed to the kinetics and mechanisms for the conversion of ice nanocrystals to acid-hydrate particles in the 110 – 150 K range. With an abundance of acid at particle surfaces, ice particles convert to the monohydrate (HCl) or dihydrate (HBr) with a rate determined by diffusion through the hydrate crust that quickly surrounds the ice particle cores. This rate control factor is apparent from a ~t(exp 1/3) dependence of the rate plus the results of application of the shrinking-core model of particle reaction. The kinetics of the repetitive cyclic inter-conversion of mono- and dihydrate crystalline particles will also be examined. The results of a Monte Carlo particle-reaction model developed by V. Buch and C. Yinnon will be applied to the data. |
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Vibrational Analyses of Dry and Wet Surfaces
2:00 PM-5:30 PM, Tuesday, March 30, 2004 Marriott -- Grand Ballroom H, Oral
Division of Colloid and Surface Chemistry |