Solvent structure. The use of internal pressure and cohesive energy density to examine contributions to solvent-solvent interactions

1975 ◽  
Vol 28 (8) ◽  
pp. 1643 ◽  
Author(s):  
MRJ Dack
Keyword(s):  
Energy Density ◽  
Internal Pressure ◽  
Cohesive Energy ◽  
Polar Solvent ◽  
Polar Solvents ◽  
Solvent Interactions ◽  
Cohesive Energy Density ◽  
Hexamethyl Phosphoramide ◽  
Internal Pressures ◽  
Solvent Solvent

Internal pressures, (∂U/∂V)T, have been obtained at 25� for the solvents dimethyl sulphoxide, propylene carbonate, formamide, dimethylformamide, acetonitrile, methanol and hexamethyl-phosphoramide by measurement of the thermal pressure coefficients. Data in the literature suggest that values of the internal pressure and the cohesive energy density, (ΔU/Vm), are similar for a non-polar solvent. The observed divergence of the two properties in the polar solvents under investigation is discussed in terms of the nature of the solvent-solvent interactions.

scholarly journals Cohesive Energy Densities Versus Internal Pressures of Near and Supercritical Fluids

Molecules ◽  
2019 ◽  
Vol 24 (5) ◽  
pp. 961 ◽  
Author(s):  
Michal Roth
Keyword(s):  
Energy Density ◽  
Internal Pressure ◽  
Molar Volume ◽  
Intermolecular Interactions ◽  
Supercritical Fluids ◽  
Cohesive Energy ◽  
Equations Of State ◽  
Reduced Pressure ◽  
Cohesive Energy Density ◽  
Internal Pressures

Over half a century ago, Wiehe and Bagley suggested that a product of the internal pressure and molar volume of a liquid measures the energy of nonspecific intermolecular interactions whereas the cohesive energy reflects the total energy of intermolecular interactions in the liquid. This conjecture, however, has never been considered in connection with near and supercritical fluids. In this contribution, the cohesive energy density, internal pressure and their ratios are calculated from high precision equations of state for eight important fluids including water. To secure conformity to the principle of corresponding states when comparing different fluids, the calculations are carried out along the line defined by equality between the reduced temperature and the reduced pressure of the fluid (Tr = Pr). The results provide additional illustration of the tunability of the solvent properties of water that stands apart from those of other near and supercritical fluids in common use. In addition, an overview is also presented of the derivatives of cohesive energy density, solubility parameter and internal pressure with respect to temperature, pressure and molar volume.

Liquid Structure, Thermodynamics, and Mixing Behavior of Saturated Hydrocarbon Polymers. 1. Cohesive Energy Density and Internal Pressure

1998 ◽  
Vol 31 (20) ◽  
pp. 6991-6997 ◽  
Author(s):  
Janna K. Maranas ◽  
Maurizio Mondello ◽  
Gary S. Grest ◽  
Sanat K. Kumar ◽  
Pablo G. Debenedetti ◽  
...  
Keyword(s):  
Energy Density ◽  
Internal Pressure ◽  
Cohesive Energy ◽  
Saturated Hydrocarbon ◽  
Liquid Structure ◽  
Cohesive Energy Density ◽  
Mixing Behavior ◽  
Hydrocarbon Polymers

Internal pressure and cohesive energy density for binary non-electrolyte mixtures

1990 ◽  
Vol 19 (9) ◽  
pp. 911-921 ◽  
Author(s):  
Ines L. Acevedo ◽  
Graciela C. Pedrosa ◽  
Miguel Katz
Keyword(s):  
Energy Density ◽  
Internal Pressure ◽  
Cohesive Energy ◽  
Electrolyte Mixtures ◽  
Cohesive Energy Density
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