| Autor: |
Malik, P., Rzoska, S. J., Drozd-Rzoska, A., Jadżyn, J. |
| Předmět: |
|
| Zdroj: |
Journal of Chemical Physics; 5/22/2003, Vol. 118 Issue 20, p9357, 7p, 4 Charts, 6 Graphs |
| Abstrakt: |
Results of comprehensive temperature (T) and pressure (P) studies of static dielectric permittivity (∊') and electric conductivity (σ) in the one- and two-phase regions of critical nitrobenzene-dodecane mixture are presented. A strong asymmetry of determined coexistence curves causes a strong violation of the law of rectilinear diameter. The obtained critical anomalies in the homogeneous phase [∊[SUBhomoSUP'](T), [SUBhomoSUP'](P)(σ)[SUBhomo](P)] or the diameter of the binodal [[SUBmeanSUP'](T), [SUBmeanSUP'] (σ)[SUBmean](P)] are associated with the same critical exponent &fi;= 1-α ≈0.88, where α is the specific heat critical exponent. Critical anomalies for the isothermal, pressure path exhibit a set of favorite in comparison with results obtained in σ(T) and ∊(T) tests. They are: the negligible influence of the critical Maxwell-Wagner effect, the hardly visible appearance of the correction-to-scaling term, a more pronounced manifestation of critical anomalies, and a reduced number of fitted parameters. Particularly noteworthy is the evidence for the σ[SUBhomo](P) anomaly in)the homogeneous phase, hardly obtained up to now in a mixture of a low electric conductivity. Results presented suggest the isomorphic behavior of ∊'(T), &sigmas;(T) and ∊'(P), σ(P) critical anomalies for the homogeneous phase and for the diameter of the binodal. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
