Diffusion in binary mixtures

✍ Scribed by C.O. Bennett

• Publisher: Elsevier Science
• Year: 1958
• Tongue: English
• Weight: 600 KB
• Volume: 9
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(58)87006-2

✦ Synopsis

The effect on the ordinary coefficient of diffusion of the mobilities of two interdiffusing, non-ionic components is evaluated by a straightforward application of the equations of irreversible thermodynamics along the lines suggested by DE GROOT [l]. The form of the resultant equations for the diffusion coefficient indicates that this approach does not agree with experiment so well as that of considering the effect of the different mobilities according to the equations proposed by DARKEN [2] and others. The analysis given in the text indicates that a binary diffusion coefficient is best calculated from the measured rates of diffusion of radio-active tracers by the equations of DARKEN [2].