Solvation effects in near-critical binary mixtures

Solvation effects in near-critical binary mixtures.

A Ginzburg-Landau theory is presented to investigate solvation effects in near-critical polar fluid binary mixtures. Concentration dependence of the dielectric constant gives rise to a shell region around a charged particle within which solvation occurs preferentially. As the critical point is approached, the concentration has a long-range Ornstein-Zernike tail representing strong critical elec...

Temperature and pressure studies of dielectric permittivity in near-critical binary mixtures

Ion solvation in liquid mixtures: effects of solvent reorganization.

Using field-theoretic techniques, we study the solvation of salt ions in liquid mixtures, accounting for the permanent and induced dipole moments, as well as the molecular volume of the species. With no adjustable parameters, we predict solvation energies in both single-component liquids and binary liquid mixtures that are in excellent agreement with experimental data. Our study shows that the ...

Behavior of the Thermodynamic Properties of Binary Mixtures near the Critical Azeotrope

In this work we investigate the critical line of binary azeotropic mixtures of acetone-n-pentane. We pinpoint the abnormal behavior of the critical density line as a function of the mole fraction of one of the component and show its influence on other thermodynamic properties such as the volume, the enthalpy and the entropy.

Surface Adsorption and Orientation near the Critical Point of Binary Liquid Mixtures

The noncritical liquid/vapor surface is completely saturated with the component of smaller surface tension for sufficiently large surface tension difference between the two components of a critical liquid binary mixture. This complete (or strong) adsorption is described by a universal scaling function of the volume fraction order parameter. We have determined the universal function P; the model...