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Enthalpy and heat capacity of Na2MoO4 and CaMoO4

Author:
Sugawara, Toru, Jin, Kosuke
Source:
Thermochimica acta 2018 v.669 pp. 185-193
ISSN:
0040-6031
Subject:
differential scanning calorimetry, enthalpy, heat, melting, melting point, temperature
Abstract:
Differential scanning calorimetry (DSC) and drop calorimetry were performed on Na2MoO4 and CaMoO4 (powellite). The heat capacity of α-Na2MoO4 by DSC measurement almost agreed with that by previous drop calorimetry. The heat capacity and enthalpy of Na2MoO4 were optimized as a function of temperature from 273 K to 1550 K by combining new calorimetric data and published data. The heat of fusion of CaMoO4 was 95.8 ± 1.6 kJ·mol−1 at melting point (1744 ± 5 K) and the heat capacity of the melt was 180.6 ± 5.1 J·mol −1 K−1. The heat capacity and enthalpy of CaMoO4 were formulated as a function of temperature in the range of 273 K to 1875 K.
Agid:
6155827