A New Technique for the Determination of Heats of Sublimation of Slightly Volatile Substances | Zendy

O. C. Simpson | Zendy; R.J. Thorn | Zendy

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

Author(s) -

O. C. Simpson,

R.J. Thorn

Publication year - 1949

Publication title -

review of scientific instruments

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.605

H-Index - 165

eISSN - 1089-7623

pISSN - 0034-6748

DOI - 10.1063/1.1741582

Subject(s) - sublimation (psychology) , materials science , graphite , vapor pressure , water vapor , thermodynamics , enthalpy of sublimation , condensation , analytical chemistry (journal) , chemistry , chromatography , composite material , organic chemistry , physics , psychology , psychotherapist

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 μg per cm2 can be detected.

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