• Diffusion coefficients at infinite dilution were determined by NMR and molecular simulations. yields precise results for the diffusion coefficient from simple equilibrium measurements. Data CO 2 CH 4 in six solvents are provided evaluated. Results compared to prediction methods literature. important basic data all processes involving mass transfer. They can be obtained studying samples using ...

Precise measurements on the density of sodium polystyrenesulphonate solutions in methanol-water mixed solvent media containing 8, 16, and 25 weight per cent of methanol at 308.15, 318.15, and 323.15 K are reported. The degree of substitution of sodium polystyrenesulphonate used is 1, and the concentrations are varied from 1 ×10 to 3.8 ×10 monomol.l. The results showed a slight increase on the p...

if the solute is a nonelectrolyte. TJo is the viscosity of the pure solvent. Considerable experimental and theoretical effort has been devoted to a determination of the coefficient ai, the so-called intrinsic viscosity, for susp'ensions of particles of various shapes since Einstein's [1] 1 original hydrodynamic treatment of sphcres. In these hydrodynamic theories, al is a measure of the disturb...

The apparent molar compressibilities φK of aqueous 3-1 electrolyte solutions have been determined from ultrasound velocity and density measurements at 20 C. The values of φK have been extrapolated to infinite dilution, and the total hydration numbers Zo for investigated solutions were estimated from the data φK. A correlation between the hydration and the atomic number of elements of the Period...

The structural and thermodynamic properties of mixtures of colloidal spheres and nonadsorbing polymer chains are studied within a general two-component macromolecular liquid state approach applicable for all size asymmetry ratios. The dilute limits, when one of the components is at infinite dilution but the other concentrated, are presented and compared to field theory and to models that replac...

In this study, thermodynamic properties, namely retention volume, infinitely dilute weight fraction activity coefficient, Flory–Huggins interaction parameter, solubility parameter of the polymer, partition coefficient and diffusion coefficients of the various solvents in poly(methyl methacrylate co butyl methacrylate) (PMMA co BMA) at infinite dilution of the solvent have been determined by inv...

A two dimensional model of water, so-called Mercedes-Benz model, was used to study effects of the size of hydrophobic solute on the insertion thermodynamics in electrolyte solutions. The model was examined by the constant pressure Monte Carlo computer simulation. The results were compared with the experimental data for noble gasses and methane in water and electrolyte solution. The influence of...

The feasibility of preparation of novel controlled release systems for the delivery of fragrances was investigated. The thermodynamic interactions of model substances which are typical constituents of fragrances with various copolymers were analyzed in the presence of a surrounding fluid. Conditions of favorable release were established by estimating the fragrance partition coefficient. Infinit...

A Green-Kubo expression for the nonequilibrium correction to the velocity distribution function is studied in a molecular dynamics simulation for systems interacting through a 6-12 potential and undergoing linear shear. As a function of velocity, the first correction to the distribution function has a form similar to what would be obtained from the Boltzmann-Enskog equation, although the amplit...

In the real world, diffusion-limited reactions in chemistry and biology mostly occur in crowded environments, such as macromolecular complex formation in the cell. Despite the paramount importance of such phenomena, theoretical approaches still mainly rely on the Smoluchowski theory, only valid in the infinite dilution limit. In this paper we introduce a novel theoretical framework to describe ...