THERMOELECTRIC VAPOR PRESSURE OSMOMETRY

Abstract

The thermoelectric vapor pressure osmometer is established as a satisfactory instrument for the determination of the vapor pressure lowering of solutes in solutions. The calibration constant, a sub 1, of the instrument is demonstrated to be independent of the nature of the solute and can be calculated from a knowledge of the system geometry and measurable thermodynamic and transport parameters. Experimental results are evaluated in terms of the change in resistance of the thermistor and the concentration of solution. It is necessary to use a second-degree equation in concentration plot to fit the data. Evaluation of the coefficient of the second-order term requires the incorporation of a heat-of-mixing term in the form of the Van Laar equation. The concentration-independent term beta for the heat of mixing is obtained for fourteen solute-solvent pairs.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1967
Accession Number
AD0648377

Entities

People

  • Arnold Adicoff
  • Warren J. Murbach

Organizations

  • Naval Air Weapons Station China Lake

Tags

Communities of Interest

  • Advanced Electronics
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Air Force Facilities
  • Chemistry
  • Coefficients
  • Conduction (Heat Transfer)
  • Efficiency
  • Geometry
  • Heat Energy
  • Heat Of Vaporization
  • Jet Propulsion
  • Measurement
  • Munitions
  • Semiconductors
  • Systems Engineering
  • Thermal Conductivity
  • Vapor Pressure
  • Vaporization

Readers

  • Mathematics or Statistics
  • Quantum Chemistry
  • Thermal Physics or Thermal Science.