DESIGN, CONSTRUCTION AND TESTING OF A HEAT OF VAPORIZATION CALORIME4STIG

Abstract

The development of a method for determination of heat of vaporization at 25 C of substances exerting a vapor pressure in the range 1 to 0.001 mm Hg started out from the carrier-gas method worked out by Dr. I. Wadso of this laboratory for substances with vapor pressures between 100 and 1 mm Hg (Acta Chem. Scand. 14(1960), 566). In the preliminary investigations it was found that expected variations in back-ground effects due to thermal changes in the carrier-gas during the passage through the evaporation chamber would cause serious difficulties in the low pressure region. This technique was therefore abandoned and, in the next step, different types of large-orifice evaporation chambers were investigated. The results were felt to be promising and a preliminary apparatus was constructed and tested. From the experience gained the design was changed and a calorimeter system has recently been completed which is believed to be of a close to final design. So far, only a few tests have been performed, mainly of a technique for introducing samples and thermal stability. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 25, 1961
Accession Number
AD0257179

Entities

Organizations

  • Lund University

Tags

DTIC Thesaurus Topics

  • Buildings And Structures
  • Calorimeters
  • Construction
  • Evaporation
  • Fluids
  • Ground Effect
  • Heat Energy
  • Heat Of Vaporization
  • Latent Heat
  • Phase Transformations
  • Research Facilities
  • Thermal Stability
  • Vapor Pressure
  • Vaporization
  • Vapors

Fields of Study

  • Engineering

Readers

  • Combustion and Flow Dynamics.
  • Materials Science and Engineering.
  • Systems Analysis and Design