Some uses and misuses of thermodynamic models for dilute liquid solutions

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00023a063· OSTI ID:5719709

Cabezas, H Jr ^[1]; O'Connell, J P ^[2]

---

1. Univ. of Arizona, Tucson, AZ (United States). Dept. of Chemical Engineering
2. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Chemical Engineering

Polymer solubility, liquid-liquid solute partitioning, and electrolyte activities are examples of important thermodynamic properties of liquid systems where components are found at low concentrations in solvents. It is common to analyze solution composition data with expressions such as osmotic virial expansions and/or Debye-Hueckel electrostatic models without careful regard for the correct relationship of the coefficients to the molecular solute-solute interactions. The purpose of this work is to (1) note the different thermodynamic variables of solutions, (2) briefly summarize the connections of the coefficients to molecular interactions, (3) demonstrate how the differences are related to experimental values, and (4) illustrate practical cases in phase equilibria of polymeric and ionic solutes.

• DOE Contract Number: FG05-88ER13943
• OSTI ID: 5719709
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 32:11; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AQUEOUS SOLUTIONS
DIFFUSION
DISPERSIONS
ELECTROLYTES
MIXTURES
OSMOSIS
PHYSICAL PROPERTIES
POLYMERS
SOLUBILITY
SOLUTIONS
THERMODYNAMIC PROPERTIES
USES