Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

The high temperature heat capacity of NpO2

Benes, O., Gotcu-Freis, P., Schworer, F.[Felicitas], Konings, R. J. M., Fanghanel, T.[Thomas]
J. Chem. Thermodyn. 2011, 43, 5, 651-655
ABSTRACT
The enthalpy increments of pure NpO2 have been measured using drop calorimetry in the temperature range from (376 to 1770) K. The heat capacity was derived using the obtained data constrained to 66.20 J K-1 mol-1 at 298.15 K taken from published low temperature measurements. The heat capacity of NpO2 determined in this study is given by the following equation: Cp,m/(J K-1 mol-1) = 71.608 + 0.015845 (T/K) - 900648 (T/K)-2
Compounds
# Formula Name
1 NpO2 neptunium(IV) oxide
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Drop calorimetry
  • 17
  • POMD
  • 1
  • Molar enthalpy, kJ/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Drop calorimetry
  • 29
  • POMD
  • 1
  • Molar enthalpy, kJ/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Drop calorimetry
  • 17
  • POMD
  • 1
  • Molar entropy, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Drop calorimetry
  • 17