ENTHALPY OF FORMATION OF AQUEOUS HYDROFLUORIC ACID: REVISION NEEDED?

@article{Paulechka2020ENTHALPYOF,
  title={ENTHALPY OF FORMATION OF AQUEOUS HYDROFLUORIC ACID: REVISION NEEDED?},
  author={Eugene Paulechka and Andrei F. Kazakov},
  journal={The Journal of chemical thermodynamics},
  year={2020},
  volume={142}
}
Accurate enthalpies of formation of hydrofluoric acid in the gas and liquid states as well as in aqueous solutions are critical for reduction and interpretation of combustion calorimetry data for fluorinated compounds. Analysis of current recommendations reveals inconsistencies with the existing literature that can significantly affect experimental values derived using these recommendations. Through thorough and comprehensive analysis of available experimental data, including the sources not… Expand
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References

SHOWING 1-10 OF 86 REFERENCES
The enthalpies of solution and formation of ammonia
Abstract The standard enthalpy of solution of gaseous ammonia in water to form the non-ionized solute was found to be ΔHsolno(298.15 K) = − (8448 ± 15) calth mol−1 by direct solution calorimetry. TheExpand
Acidity constant of hydrofluoric acid
A detailed experimental investigation of the association (acidity) constant of hydrofluoric acid has been made at 25°C in sodium perchlorate media at ionic strengths between 0.01 and 0.5M. ResultsExpand
The enthalpy of solution of gaseous hydrogen fluoride in water at 25 °C
Gaseous hydrogen fluoride was dissolved directly in excess sodium hydroxide in a calorimeter. To reduce the magnitude of the corrections to the ideal gaseous state, the gas was introduced atExpand
The enthalpies of formation of iodine pentafluoride and iodine heptafluoride
Abstract The energy of combustion of iodine in fluorine was measured in a bomb calorimeter and the standard enthalpy of formation of liquid iodine pentafluoride, ΔHfo(IF5, 1, 298·15 K), wasExpand
The Heat of Formation of Boron Trifluoride by Direct Combination of the Elements.
  • E. S. Domalski, G. Armstrong
  • Chemistry, Medicine
  • Journal of research of the National Bureau of Standards. Section A, Physics and chemistry
  • 1967
TLDR
The energy of combination of crystalline boron in gaseous fluorine was measured in a bomb calorimeter and this result is compared with other recent work on and related to the heat of formation of borons trifluoride. Expand
The Activity Coefficients of Hydrofluoric Acid in Water from 0 to 35 °C.
  • W. Hamer, Yung-chi Wu
  • Chemistry, Medicine
  • Journal of research of the National Bureau of Standards. Section A, Physics and chemistry
  • 1970
TLDR
It is shown that values for the concentrations of the various ionic species in hydrofluoric acid depend on the functions used to represent the ionic activity coefficients whereas values of the mean activity are independent of such functions. Expand
Gas imperfections and thermodynamic excess properties of gaseous hydrogen fluoride
Abstract Deviations from ideality in the form of thermodynamic excess functions, (X-Xo), have been computed for the volume, Gibbs energy, entropy, enthalpy, and energy for HF(g) between 292.69 andExpand
Critical evaluation of the enthalpies of formation for fluorinated compounds using experimental data and high-level ab initio calculations.
TLDR
A priori evaluation of the data quality was found to be inefficient despite all available experimental data for C1─C3 hydrofluorocarbons and 34 data points for medium-size organofluorine compounds being considered. Expand
Enthalpies de dilution des solutions aqueuses de fluorure et d'hydrogeno-fluorure d'ammonium
Abstract The enthalpies of dilution of NH 4 F, NH 4 HF 2 and HF have been measured in the range of concentration 0 mol.1 −1 − 2 mol.1 −1 . The two salts have the same enthalpy of dilution at theExpand
The enthalpy of ionization of aqueous ammonia
Abstract For the ionization of aqueous ammonia, NH 3 (aq) + H 2 O(1) = NH 4 + (aq) + OH − (aq); ΔH f o (298.15 K) = (920 ± 10) cal th mol −1 , measured by solution calorimetry. For NH 4 Cl(s), ΔHExpand
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