HfC0.98: enthalpy of formation

1 accepted literature formation-enthalpy value(s) (experimental 1).

Systems: C–Hf

Literature values

Enthalpy of formation of HfC0.98 reported in the literature (1)
ValuePhase as printedT (K)ClassMethodSystemSourceLocationQuote
-209.7 kJ/mol (basis unstated) ± 13.5HfC0.9801780experimentalDirect reaction calorimetryC–Hf[1] Bittermann 1997
cites ref. 89Ber		Table 3, p. 3, row 8
report

Uncertainty budget

Components kept separate, in the value's unit (literature SCHEMA.md, UNCERTAINTY_CALIBRATION.md): effective = max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter). The method floor is the robust between-study scatter of the method class in ORCHID (calibrated) or a documented prior; printed values and printed uncertainties are unchanged.

Uncertainty budget of the literature values of HfC0.98
ValueUnitPrintedReadingMethod (class, basis)CompositionScatterConversionEffective
-209.7kJ/mol (basis unstated)13.50.056.4 (solution_reaction_calorimetry, calibrated)13.5

Sources

  1. H. Bittermann, P. Rogl, Critical assessment and thermodynamic calculation of the binary system hafnium-carbon (Hf-C), JPE 18, 344-356 (1997). doi:10.1007/s11669-997-0061-3