Solution-calorimetric determination of the standard molar enthalpies of formation of the pseudobinary compounds Zr(AlxFe1 - x)2 at the temperature 298.15 K

R. Klein, I. Jacob, P. A.G. O'Hare, R. N. Goldberg

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36 Scopus citations

Abstract

Standard molar enthalpies of formation ΔfHo m at the temperature T = 298.15 K have been determined from calorimetric measurements of the enthalpies of reaction ΔfHo m of six compositions in the Zr(AlxFe1 - x)2 pseudobinary system with (hydrofluoric acid + nitric acid). The following results (with uncertainties given as twice the standard deviation of the mean) are reported. See Table. Previous thermodynamic studies of the terminal compositions (x = 0, 1) have been reviewed, and the following quantities at T = 298.15 K are recommended: ΔfHo m(ZrFe2) = -(75 ± 6) kJ·mol-1 and ΔfHo m(ZrAl2) = -(147 ± 7) kJ·mol-1.

Original languageEnglish
Pages (from-to)599-608
Number of pages10
JournalJournal of Chemical Thermodynamics
Volume26
Issue number6
DOIs
StatePublished - 1 Jun 1994

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science (all)
  • Physical and Theoretical Chemistry

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