Design improvements in adiabatic calorimetry: The heat capacity of cholesterol between 10 and 425 K

Design improvements in an adiabatic calorimeter are described. The changes make it possible to load or unload the calorimeter in half an hour. A new regulation system is discussed and changes in the data collection and the data calculation programs are given. The molar heat capacity of cholesterol h...

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Veröffentlicht in:Thermochimica acta 1998-10, Vol.319 (1), p.151-162
Hauptverfasser: Miltenburg, J.C.van, Genderen, A.C.G.van, den Berg, G.J.K.van
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Sprache:eng
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Zusammenfassung:Design improvements in an adiabatic calorimeter are described. The changes make it possible to load or unload the calorimeter in half an hour. A new regulation system is discussed and changes in the data collection and the data calculation programs are given. The molar heat capacity of cholesterol has been measured between 5 and 425 K. The derived thermodynamic properties are calculated. The solid–solid transition was found at 306.7 K, with an enthalpy of transition of 3886 J mol −1. The melting temperature was found to be 422.3 K, the enthalpy of fusion being 28.4 kJ mol −1.
ISSN:0040-6031
1872-762X
DOI:10.1016/S0040-6031(98)00402-X