The Heat Capacities of Uranium, Uranium Trioxide, and Uranium Dioxide from 15°K to 300°K
- 1 April 1952
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 20 (4) , 695-699
- https://doi.org/10.1063/1.1700518
Abstract
Heat capacity measurements have been made over the temperature range 15–300°K for uranium metal, uranium trioxide, and uranium dioxide. A maximum was observed at 28.7°K in the heat capacity curve of UO2 which is probably the result of the changing population of the magnetic quadrivalent uranium ions among their available energy states. The entropies of these substances at 298.16°K are 12.03, 23.57, and 18.63 cal deg−1 mole−1, respectively. The free energies of formation of UO3 and UO2 are −273.1±3 and −246.6±0.6 kcal mole−1, respectively.Keywords
This publication has 11 references indexed in Scilit:
- A Theory of Cooperative PhenomenaPhysical Review B, 1951
- Thermodynamic functions for molecular oxygen in the ideal gas stateJournal of Research of the National Bureau of Standards, 1948
- High-Temperature Heat Contents of Uranium, Uranium Dioxide and Uranium Trioxide1Journal of the American Chemical Society, 1947
- The Heat Capacities and Entropies of Aluminum and Copper from 15 to 300°K.Journal of the American Chemical Society, 1941
- On the Theory of AntiferromagnetismThe Journal of Chemical Physics, 1941
- Die magnetischen Eigenschaften der UranoxydeThe Science of Nature, 1940
- The Crystalline Structure of UraniumJournal of the American Chemical Society, 1937
- The Entropy of Water from the Third Law of Thermodynamics. The Dissociation Pressure and Calorimetric Heat of the Reaction Mg(OH)2 = MgO + H2O.. The Heat Capacities of Mg(OH)2 and MgO from 20 to 300°K.Journal of the American Chemical Society, 1937
- Preparation of Metal Powders by Electrolysis of Fused Salts1I—Ductile UraniumIndustrial & Engineering Chemistry, 1930
- THE ENTROPY OF HYDROGEN CHLORIDE. HEAT CAPACITY FROM 16°K. TO BOILING POINT. HEAT OF VAPORIZATION. VAPOR PRESSURES OF SOLID AND LIQUIDJournal of the American Chemical Society, 1928