Abstract
Coefficients of self-diffusion have been measured by the spin-echo technique for neat NH3 and ND3 from 200 to 298°K. The data are well represented by D=(4.5± 0.2)× 10−3exp [−(2.07± 0.02)/RT] for NH3 and by D=(6.0± 0.3)× 10−3exp [−(2.31± 0.02)/RT] for ND3. The difference in activation energy for self-diffusion between NH3 and ND3 is shown to be consistent with the viscosity measurements of Hutchison and O'Reilly. These results are interpreted by means of a quasilattice model for self-diffusion in the liquid state. Values of the work required to create a molecular vacancy are evaluated from liquid density, isothermal compressibility and the scaled particle theory. The quasilattice model yields pre-exponential factors for self-diffusion that are in reasonable agreement with experiment.
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Dates
Type | When |
---|---|
Created | 21 years, 6 months ago (Feb. 4, 2004, 5:30 p.m.) |
Deposited | 1 year, 6 months ago (Feb. 9, 2024, 6:25 a.m.) |
Indexed | 7 months, 4 weeks ago (Dec. 30, 2024, 1:09 p.m.) |
Issued | 52 years, 3 months ago (May 15, 1973) |
Published | 52 years, 3 months ago (May 15, 1973) |
Published Print | 52 years, 3 months ago (May 15, 1973) |
@article{O_Reilly_1973, title={Self-diffusion in liquid ammonia and deuteroammonia}, volume={58}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1678963}, DOI={10.1063/1.1678963}, number={10}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={O’Reilly, D. E. and Peterson, E. M. and Scheie, C. E.}, year={1973}, month=may, pages={4072–4075} }