Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Torsion Vapor Pressures and Sublimation Enthalpies of Aluminum Trifluoride and Aluminum Trichloride

Brunetti, B.[Bruno], Piacente, V.[Vincenzo], Scardala, P.[Paolo]
J. Chem. Eng. Data 2009, 54, 3, 940-944
ABSTRACT
The vapor pressures of solid AlF3 and AlCl3 were measured by the torsion-effusion method. Their temperature dependences fit the following equations: log(p/kPa) ) (11.70 ( 0.20) - (14 950 ( 200)(T/K) (from (956 to 1113) K) and log(p/kPa) ) (15.50 ( 0.30) - (6200 ( 200)(T/K) (from (321 to 378) K) for AlF3 and AlCl3, respectively. Treating the measured vapor pressures by the second- and third-law methods, the average standard enthalpies of the sublimation of 1 mol solid AlF3 and AlCl3 to AlF3(g) and Al2Cl6(g), AsubHdeg (298.15 K) ) (301 ( 4) kJ * mol-1 and (59 ( 2) kJ * mol-1, respectively, were calculated.
Compounds
# Formula Name
1 AlF3 aluminum fluoride
2 AlCl3 aluminum chloride
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
  • Vapor or sublimation pressure, kPa ; Crystal
  • Temperature, K; Crystal
  • Crystal
  • Gas
  • Torsion effusion method
  • 57
  • POMD
  • 2
  • Vapor or sublimation pressure, kPa ; Crystal
  • Temperature, K; Crystal
  • Crystal
  • Gas
  • Torsion effusion method
  • 49