High pressure calorimetry as applied to piezothermal analysis

This paper describes an apparatus which can be used to determine bulk thermal expansion coefficients of liquids as a function of temperature and pressure up to 10 kilobar in a temperature range from −20° to 100 °C. The principle of the method consists in measuring the heat of compression by a step b...

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Bibliographic Details
Published in:Review of scientific instruments 1976-01, Vol.47 (1), p.66-71
Main Authors: Pruzan, Philippe, Minassian, Léon Ter, Figuiere, Pierre, Szwarc, Henri
Format: Article
Language:English
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Summary:This paper describes an apparatus which can be used to determine bulk thermal expansion coefficients of liquids as a function of temperature and pressure up to 10 kilobar in a temperature range from −20° to 100 °C. The principle of the method consists in measuring the heat of compression by a step by step procedure. The apparatus is a Joule twin calorimeter which is composed of a high pressure vessel and a reference cylinder. Temperature differences between these two components can be detected at better than 10−5 K by means of a gas thermometer, thus providing high sensitivity. Results are given for liquid n‐hexane and ethyl alcohol.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1134493