Abstract

From the results of adiabatic-calorimetric measurements, mercury has been certified as a standard reference material for temperature and enthalpy of fusion for differential scanning calorimetry. The fusion temperature is (234.30 ± 0.03) K and the molar enthalpy of fusion is (2.301 ± 0.001) kJ·mol −1. Adiabatic-calorimetric measurements made by heating continuously at 0.00017 K·s −1 through the transition showed a fusion temperature of (234.32 ± 0.03) K. Differential-scanning-calorimetric measurements gave a fusion temperature of (234.34 ± 048) K.

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