Diffusion in Binary Systems
- 1 August 1953
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 21 (8) , 1344-1347
- https://doi.org/10.1063/1.1699217
Abstract
The Onsager‐Fuoss equation for the concentration dependence of the diffusion coefficient is derived from a kinetic picture, taking into account the asymmetry in the Brownian motion induced by concentration gradients. Mass flow is introduced by considering diffusion in the presence of a pressure gradient. Systems exhibiting volume changes on mixing are discussed, and a modification of the Matano procedure for calculating diffusion coefficients is suggested. It is shown that diffusion coefficients obtained from steady‐state permeability measurements and those obtained from interdiffusion data differ by a factor of V̄2c2, the volume fraction of the nonpermeating component.Keywords
This publication has 4 references indexed in Scilit:
- Some fundamental definitions and concepts in diffusion processesTransactions of the Faraday Society, 1949
- On the Theory of Vacancy Diffusion in AlloysPhysical Review B, 1948
- Irreversible Processes in Electrolytes. Diffusion, Conductance and Viscous Flow in Arbitrary Mixtures of Strong ElectrolytesThe Journal of Physical Chemistry, 1932
- The Coupled Nature of Lactic Acid-Glycogen Synthesis in MuscleThe Journal of Physical Chemistry, 1932