hydrogen fluoride

• Formula: FH
• Molecular weight: 20.00634
• IUPAC Standard InChI: InChI=1S/FH/h1H Copy

  
• IUPAC Standard InChIKey: KRHYYFGTRYWZRS-UHFFFAOYSA-N Copy
• CAS Registry Number: 7664-39-3
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
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• Isotopologues:
  • [2H]hydrogen fluoride
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• Information on this page:
  • Gas phase thermochemistry data
  • Phase change data
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • Constants of diatomic molecules
• Data at other public NIST sites:
  • Microwave spectra (on physics lab web site)
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Gas phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Gas Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Phase change data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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References

Go To: Top, Gas phase thermochemistry data, Phase change data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Streng, 1971
Streng, A.G., Miscibility and Compatibility of Some Liquid and Solidified Gases at Low Temperature, J. Chem. Eng. Data, 1971, 16, 357. [all data]

Campbell and Campbell, 1934
Campbell, Alan Newton; Campbell, Alexandra Jean Robson, The thermodynamics of binary liquid mixtures : formic acid and water, Trans. Faraday Soc., 1934, 30, 1109, https://doi.org/10.1039/tf9343001109 . [all data]

Simons, 1924
Simons, Joseph, THE PREPARATION, FREEZING POINT AND VAPOR PRESSURE OF HYDROGEN FLUORIDE, J. Am. Chem. Soc., 1924, 46, 10, 2179-2183, https://doi.org/10.1021/ja01675a006 . [all data]

Sheft, Perkins, et al., 1973
Sheft, I.; Perkins, A.J.; Hyman, H.H., Anhydrous Hydrogen Fluoride: Vapor Pressure and Liquid Density, J. Inorg. Nucl. Chem., 1973, 35, 11, 3677-3680, https://doi.org/10.1016/0022-1902(73)80055-7 . [all data]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Phase change data, References

• Symbols used in this document:
  

  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  Tboil	Boiling point
  Tfus	Fusion (melting) point
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔvapH	Enthalpy of vaporization

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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