Accession Number : ADA319935

Title :   A New Technique for the Determination of Heats of Sublimation of Slightly Volatile Substances,

Corporate Author : TECHNICAL INFORMATION SERVICE (AEC) OAK RIDGE TN

Personal Author(s) : Simpson, O. C. ; Thorn, R. J.

PDF Url : ADA319935

Report Date : 28 MAY 1948

Pagination or Media Count : 7

Abstract : A technique is described which enables one to measure relative vapor pressures by measuring the rate of change of transmissivity of thin deposits as they are formed by condensation from the vapor. From the temperature dependence of this rate the heat of sublimation of slightly volatile substances can be determined. In the case of graphite, deposits of the order of 0.1 microgram per sq cm can be detected.

Descriptors :   *VOLATILITY, *VAPOR PRESSURE, *CHEMICAL COMPOUNDS, *HEAT OF SUBLIMATION, THERMAL PROPERTIES, VAPORS, GRAPHITE, PRESSURE MEASUREMENT, DEPOSITS, THINNESS, CONDENSATION, TRANSMISSIVITY.

Subject Categories : Physical Chemistry
      Inorganic Chemistry
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE