Tracer Diffusion of 65Zn2+ in Binary Isobutyric Acid + Water Mixtures Near the Critical Point
| Autor: | Moncef Bouanz |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Physics and Astronomy (miscellaneous)
Concentration dependence Chemistry Capillary action Shear viscosity Inorganic chemistry General Engineering Solvation Analytical chemistry Binary number Atomic and Molecular Physics and Optics Isobutyric acid chemistry.chemical_compound Critical point (thermodynamics) TRACER |
| Zdroj: | Journal de Physique II. 6:1571-1583 |
| ISSN: | 1286-4870 1155-4312 |
| DOI: | 10.1051/jp2:1996148 |
| Popis: | Tracer diffusion coefficients of 65 Zn 2+ in mixtures of isobutyric acid water and 10 -4 M ZnCl 2 have been measured over the composition range 0 < X < 95% in acid ; at θ 1 = T 1 - T c = 0.547 K and θ 2 = T 2 - T c = 7.547 K using the open-ended capillary method. The critical temperature was found to be : T c = 27.453 ° C. An important anomaly was detected in the neighbourhood of the critical point X c = 0.38, X being the weight percentage of the acid. The concentration dependence as the shear viscosity coefficients were evaluated at each X value for the same temperatures. The results are discussed in terms of Einstein-Stokes law. Our analysis suggests three different behaviours of the diffusing entity in the mixtures and it is based on the preferential solvation phenomenon. |
| Databáze: | OpenAIRE |
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