Thermodynamics of the lanthanide trifluorides. II. The heat capacity of praseodymium trifluoride PrF/sub 3/ from 5 to 350 /sup 0/K
Journal Article
·
· J. Chem. Phys.; (United States)
OSTI ID:6518206
The heat capacity of PrF/sub 3/ was measured by aneroid adiabatic calorimetry from 5 to 350 /sup 0/K. The following results were obtained for PrF/sub 3/ (c) at 298.15 /sup 0/K: the heat capacity C/sub p//sup 0/= (92.65 +- 0.09) J /sup 0/K/sup -1/ mole/sup -1/, the entropy S/sup 0/= (121.22 +- 0.12) J /sup 0/K/sup -1/ mole/sup -1/, the enthalpy (H/sub T//sup 0/-H0)= (17 946 +- 18) J mole/sup -1/ and the Planck function -(G/sub T//sup 0/ -H/sub 0//sup 0/)/T= (61.02 +- 0.06) J /sup 0/K/sup -1/ mole/sup -1/. Recommended thermal functions from 400 to the melting temperature, 1672 /sup 0/K, are presented in tabular form. The excess heat capacity due to the internal electronic energy levels of Pr/sup 3 +/ in PrF/sub 3/ is calculated from spectroscopic data and compared with excess heat capacity derived from calorimetric results.
- Research Organization:
- Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439
- OSTI ID:
- 6518206
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 70:2; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Wed Nov 14 23:00:00 EST 1979
· J. Chem. Phys.; (United States)
·
OSTI ID:5777176
Thermodynamics of the lanthanide trifluorides. I. The heat capacity of lanthanum trifluoride, LaF/sub 3/ from 5 to 350/sup 0/K and enthalpies from 298 to 1477/sup 0/K
Journal Article
·
Sat Jul 01 00:00:00 EDT 1978
· J. Chem. Phys.; (United States)
·
OSTI ID:7063773
Thermodynamics of the lanthanide trifluorides. V. The heat capacities of dysprosium trifluoride, DyF/sub 3/, and erbium trifluoride, ErF/sub 3/, from 5 to 350 K
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· J. Chem. Phys.; (United States)
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Related Subjects
36 MATERIALS SCIENCE
360000* -- Materials
ENTHALPY
ENTROPY
FLUORIDES
FLUORINE COMPOUNDS
FORMATION HEAT
HALIDES
HALOGEN COMPOUNDS
LOW TEMPERATURE
MEDIUM TEMPERATURE
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM FLUORIDES
RARE EARTH COMPOUNDS
REACTION HEAT
SPECIFIC HEAT
THERMODYNAMIC PROPERTIES
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
360000* -- Materials
ENTHALPY
ENTROPY
FLUORIDES
FLUORINE COMPOUNDS
FORMATION HEAT
HALIDES
HALOGEN COMPOUNDS
LOW TEMPERATURE
MEDIUM TEMPERATURE
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM FLUORIDES
RARE EARTH COMPOUNDS
REACTION HEAT
SPECIFIC HEAT
THERMODYNAMIC PROPERTIES
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE