High pressure calorimetry as applied to piezothermal analysis
- 1 January 1976
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 47 (1) , 66-71
- https://doi.org/10.1063/1.1134493
Abstract
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.Keywords
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