| Autor: |
Bouanz, Moncef, Bouanz, Moncef |
| Zdroj: |
Journal de Physique II; November 1996, Vol. 6 Issue: 11 p1571-1583, 13p |
| Abstrakt: |
Tracer diffusion coefficients of 65Zn2+in mixtures of isobutyric acid water and 10-4M ZnCl2have been measured over the composition range $0 < X < 95\%$in acid; at θ1= T1-Tc= 0.547 K and θ2= T2- Tc= 7.547 K using the open-ended capillary method. The critical temperature was found to be: $T_{\rm c} = 27.453~^\circ$C. An important anomaly was detected in the neighbourhood of the critical point Xc= 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: |
Supplemental Index |
| Externí odkaz: |
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