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Standard molar enthalpies of formation of MeAl (Me = Ru, Rh, Os, Ir)

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Abstract

The standard molar enthalpies of formation of RuAl, RhAl, and IrAl have been determined by the direct combination method using a high-temperature calorimeter operated at (1473 ±2) K. The following values are reported: ΔH of (RuAl) = −(124.1 ± 3.3) kJ/mol; ΔH of (RhAl) =-(212.6 ± 3.2) kJ/mol; and ΔH of (IrAl) = -(185.5 ± 3.5) kJ/mol. For OsAl, an approximate value is −77 kJ/mol. The results are compared with available data for related alloys and with predicted values.

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Authors and Affiliations

  1. Steelmaking Department, Research Institute of Industrial Science and Technology, Pohang, Korea

    Woo-Gwang Jung (Chemist)

  2. James Franck Institute, University of Chicago, 60637, Chicago, IL

    O. J. Kleppa (Emeritus Professor)

Authors
  1. Woo-Gwang Jung
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  2. O. J. Kleppa
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Jung, WG., Kleppa, O.J. Standard molar enthalpies of formation of MeAl (Me = Ru, Rh, Os, Ir). Metall Trans B 23, 53–56 (1992). https://doi.org/10.1007/BF02654036

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