Molar volume solubility

The Hildebrand Solubility Parameter. This parameter, d> can be estimated (10) based on data for a set of additive constants, E, for the more common groups in organic molecules to account for the observed magnitude of the solubility parameter d = EE/V where Vrepresents molar volume. Solubility parameters can be used to classify plasticizers of a given family in terms of their compatibility with PVC, but they are of limited use for comparing plasticizers of different families, eg, phthalates with adipates. 

The emulsifier level can be further reduced by matching the properties of the hydrophobic moiety of the emulsifier (molar volume, solubility parameters) with those of the organic phase, and those of the hydrophilic head with the aqueous phase [3]... 

The stability of membranes in organic solvents depends on the physicochemical characteristics of solvents and membranes. The interactions of solvents with membranes can result in dilation (swelling), plasticization, or dissolution of the membrane material, and subsequent change of membrane structure, leading to changes in the properties of separation and loss of mechanical resistance to pressure. The characteristics of solvents such as molar volume, solubility, viscosity, surface tension and dielectric constant, and properties of membranes as hydrophilicity/hydrophobicity and solubility play an important role in determining the stability of membranes [17],... 

Fluid phase interactions - Second virial coefficients Solution interactions - Partial molar volumes - Solubilities Surface interactions - Adsorption isotherms Diffusion coefficients Mass transfer coefficients Molecular masses... 

A thermodynamic model based on Flory-Huggins polymer-solution theory was developed and coupled with Equation of State model to predict the amount of asphaltene precipitation. The model prediction shows close agreement with the experimental data after regression of asphaltene properties such as molar volume, solubility parameter and molecular weight. The model, however, fails to account for the effect of large changes in the solubility parameters of the oil-solvent mixtures. 

Where 8 is the solubility parameter A the energy of vaporisation V the molar volume A// the latent heat of vaporisation R the gas constant T the temperature M the moleeular weight D the density. 

Solubility parameters and liquid molar volumes for various solvents and polymers (25°C)... 

Liquid solvent/polymer Solubility parameter, <5, (J/cm ) / Molar volume, V (cm /mol)... 

Solubility parameters are generally tabulated, together with the corresponding liquid molar volumes, only at 25°C. Although solubility parameters are themselves temperature-dependent, the combination of quantities in Eq. 70 is not. Differentiating Eq. 70 with respect to temperature gives — the excess entropy, a quantity which has been assumed to be zero in accord with the definition of a regular solution. Thus only data at 25°C are needed. Solubility parameters may be... 

In this approach, connectivity indices were used as the principle descriptor of the topology of the repeat unit of a polymer. The connectivity indices of various polymers were first correlated directly with the experimental data for six different physical properties. The six properties were Van der Waals volume (Vw), molar volume (V), heat capacity (Cp), solubility parameter (5), glass transition temperature Tfj, and cohesive energies ( coh) for the 45 different polymers. Available data were used to establish the dependence of these properties on the topological indices. All the experimental data for these properties were trained simultaneously in the proposed neural network model in order to develop an overall cause-effect relationship for all six properties. 

Experimental data for Van der Waals volumes Molar volumes Heat capacities Solubility parameter and glass transition temperature... 

Figure 25 ANN model (5-8-6) training and testing results for van der Waals volume, molar volume, heat capacity, solubility parameter, and glass transition temperature of 45 different polymers.

Ammonia a base, 184 boiling point, 64 complexes, 392, 395, 408 complex with Ag+, 154 Haber process for, 150 and hydrogen chloride, 24 model of, 21 molar volume. 60, 64 production, 150 P V behavior of, 19, 51, 60 solubility, 20 Ampere, 241 Amphoteric, 371 complexes, 396 Analogy... 

Solubility Parameters and Liquid Molar Volumes in the Chao-Seader Correlation... 

In Eq. (128), the superscript V stands for the vapor phase v2 is the partial molar volume of component 2 in the liquid phase y is the (unsym-metric) activity coefficient and Hffl is Henry s constant for solute 2 in solvent 1 at the (arbitrary) reference pressure Pr, all at the system temperature T. Simultaneous solution of Eqs. (126) and (128) gives the solubility (x2) of the gaseous component as a function of pressure P and solvent composition... 

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