Fusion of mercury a new certified standard for differential scanning calorimetry

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[middle dot]mol-1. Adiabatic-calorimetric measurements made by heating continuously at 0.00017 K[middle dot]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.