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A simple adiabatic low-temperature calorimeter based on a helium refrigerator system1 Presented at the Twelfth Ulm-Freiberg Conference, Freiberg, Germany, 19–21 March 19971
The construction of an adiabatic calorimeter for the 15–300K range is described. It is fully automated and set up in a helium refrigerator system. The operation of the calorimeter was tested by measuring the specific heat capacity of a pure copper sample. The results show good agreement with the standard literature values. The specific heat capacity of a magnesium hydride sample was also determined. For MgH 2 , the standard molar entropy of S 0 (298.15)=30.64Jmol −1 K −1 was calculated from the obtained data.