Selected ATcT [1, 2] enthalpy of formation based on version 1.172 of the Thermochemical Network [3]

This version of ATcT results[3] was generated by additional expansion of version 1.156 to include species relevant to a study of photodissociation of formamide[4].

Hydrogen fluoride

Formula: HF (aq)
CAS RN: 7664-39-3
ATcT ID: 7664-39-3*800
SMILES: F
InChI: InChI=1S/FH/h1H
InChIKey: KRHYYFGTRYWZRS-UHFFFAOYSA-N
Hills Formula: F1H1

2D Image:

F
Aliases: HF; Hydrogen fluoride; Hydrogen monofluoride; Hydrofluoric acid; Fluorhydric acid; Fluorohydric acid; Fluorohydrogen; Fluoric acid; Fluorine hydride; Fluorine monohydride
Relative Molecular Mass: 20.006343 ± 0.000070

   ΔfH°(0 K)   ΔfH°(298.15 K)UncertaintyUnits
-334.67± 0.15kJ/mol

Top contributors to the provenance of ΔfH° of HF (aq)

The 17 contributors listed below account for 90.4% of the provenance of ΔfH° of HF (aq).

Please note: The list is limited to 20 most important contributors or, if less, a number sufficient to account for 90% of the provenance. The Reference acts as a further link to the relevant references and notes for the measurement. The Measured Quantity is normaly given in the original units; in cases where we have reinterpreted the original measurement, the listed value may differ from that given by the authors. The quoted uncertainty is the a priori uncertainty used as input when constructing the initial Thermochemical Network, and corresponds either to the value proposed by the original authors or to our estimate; if an additional multiplier is given in parentheses immediately after the prior uncertainty, it corresponds to the factor by which the prior uncertainty needed to be multiplied during the ATcT analysis in order to make that particular measurement consistent with the prevailing knowledge contained in the Thermochemical Network.

Contribution
(%)
TN
ID
Reaction Measured Quantity Reference
22.0529.1 HF (aq, 5500 H2O) → HF (aq) ΔrH°(298.15 K) = -10.16 ± 0.10 kJ/molPaulechka 2020, Hefter 1984, Kleboth 1970, Baumann 1969, Hepler 1953, Ellis 1963, Broene 1947, Hamer 1970
18.6528.1 HF (l) → HF (aq, 5500 H2O) ΔrH°(298.15 K) = -5.1110 ± 0.0220 kcal/molJohnson 1973, Paulechka 2020
11.2537.3 HF (g) → HF (aq) ΔrH°(298.15 K) = -14.81 ± 0.10 kcal/molVanderzee 1971, Westrum 1949, Davis 1961, Ruterjans 1969
6.8544.2 H2O (cr,l) F2 (g) → 2 HF (aq, 5 H2O) + 1/2 O2 (g) ΔrH°(298.15 K) = -356.66 ± 0.40 kJ/molPaulechka 2020, Johnson 1987, Vorobev 1960, Hummel 1959, Johnson 1973
6.1536.1 HF (g) [OH]- (aq) → F- (aq) H2O (cr,l) ΔrH°(298.15 K) = -28.065 ± 0.10 (×1.354) kcal/molVanderzee 1971
5.72149.1 NF3 (g) + 3/2 H2 (g) → 1/2 N2 (g) + 3 HF (aq) ΔrH°(298.15 K) = -871.8 ± 1.2 kJ/molArmstrong 1959
2.8537.1 HF (g) → HF (aq) ΔrH°(298.15 K) = -14.82 ± 0.20 kcal/molKhaidukov 1936, Vanderzee 1971, Parker 1965, est unc
2.8537.2 HF (g) → HF (aq) ΔrH°(298.15 K) = -14.75 ± 0.20 kcal/molHood 1951, Vanderzee 1971, Parker 1965, est unc
2.58493.1 SiO2 (vitr) + 2 F2 (g) → SiF4 (g) O2 (g) ΔrH°(298.15 K) = -170.04 ± 0.25 kcal/molWise 1963, Wise 1963
2.2486.1 1/2 H2 (g) + 1/2 F2 (g) → HF (l) ΔrH°(298.15 K) = -303.56 ± 0.27 (×1.354) kJ/molSettle 1994, Johnson 1973, note HF
1.8543.1 H2O (cr,l) F2 (g) → 2 HF (aq, 3 H2O) + 1/2 O2 (g) ΔrH°(298.15 K) = -355.46 ± 0.80 kJ/molPaulechka 2020, Good 1966, Gunn 1965, Johnson 1966, Domalski 1967a, Gross 1967
1.7546.1 SiF4 (g) + 2 H2O (cr,l) → Si (cr,l) O2 (g) + 4 HF (aq, 5 H2O) ΔrH°(298.15 K) = 899.77 ± 1.20 kJ/molPaulechka 2020, Vorobev 1960, Hummel 1959, Johnson 1987, Good 1964, Good 1964, Johnson 1973
1.5536.2 HF (g) [OH]- (aq) → F- (aq) H2O (cr,l) ΔrH°(298.15 K) = -27.93 ± 0.20 (×1.354) kcal/molVanderzee 1971
1.38492.1 SiO2 (cr,l) + 2 F2 (g) → SiF4 (g) O2 (g) ΔrH°(298.15 K) = -168.26 ± 0.28 (×1.269) kcal/molWise 1963, Wise 1963
1.12152.1 1/2 N2 (g) + 3/2 F2 (g) → NF3 (g) ΔrH°(298.15 K) = -31.44 ± 0.30 kcal/molSinke 1967
1.0545.1 SiF4 (g) + 2 H2O (cr,l) → SiO2 (cr, quartz) + 4 HF (aq, 5 H2O) ΔrH°(298.15 K) = -11.11 ± 0.37 kJ/molPaulechka 2020, Vorobev 1960, Hummel 1959, Johnson 1987, Good 1964, Good 1964, Kilday 1973, Kilday 1973, Johnson 1973
0.65960.1 CF4 (g) + 2 H2O (cr,l) → CO2 (g) + 4 HF (aq, 20 H2O) ΔrH°(298.15 K) = -41.38 ± 0.32 (×1.874) kcal/molCox 1965, as quoted by Cox 1970, Domalski 1967

Top 10 species with enthalpies of formation correlated to the ΔfH° of HF (aq)

Please note: The correlation coefficients are obtained by renormalizing the off-diagonal elements of the covariance matrix by the corresponding variances.
The correlation coefficient is a number from -1 to 1, with 1 representing perfectly correlated species, -1 representing perfectly anti-correlated species, and 0 representing perfectly uncorrelated species.


Correlation
Coefficent
(%)
Species Name Formula Image    ΔfH°(0 K)    ΔfH°(298.15 K) Uncertainty Units Relative
Molecular
Mass
ATcT ID
100.0 FluorideF- (aq)[F-]-334.67± 0.15kJ/mol18.99895178 ±
0.00000050
16984-48-8*800
91.5 Hydrogen fluorideHF (aq, undissoc)F-321.36± 0.16kJ/mol20.006343 ±
0.000070
7664-39-3*1000
75.8 Hydrogen fluorideHF (aq, 5500 H2O)F-324.55± 0.13kJ/mol20.006343 ±
0.000070
7664-39-3*955
59.1 Hydrogen fluorideHF (aq, 10000 H2O)F-325.42± 0.16kJ/mol20.006343 ±
0.000070
7664-39-3*850
59.1 Hydrogen fluorideHF (aq, 7500 H2O)F-324.98± 0.16kJ/mol20.006343 ±
0.000070
7664-39-3*847
59.1 Hydrogen fluorideHF (aq, 20000 H2O)F-326.65± 0.16kJ/mol20.006343 ±
0.000070
7664-39-3*852
59.1 Hydrogen fluorideHF (aq, 50000 H2O)F-328.57± 0.16kJ/mol20.006343 ±
0.000070
7664-39-3*855
59.1 Hydrogen fluorideHF (aq, 100000 H2O)F-330.12± 0.16kJ/mol20.006343 ±
0.000070
7664-39-3*861
59.1 Hydrogen fluorideHF (aq, 500000 H2O)F-333.04± 0.16kJ/mol20.006343 ±
0.000070
7664-39-3*866
55.0 Hydrogen fluorideHF (l)F-303.201± 0.099kJ/mol20.006343 ±
0.000070
7664-39-3*590

Most Influential reactions involving HF (aq)

Please note: The list, which is based on a hat (projection) matrix analysis, is limited to no more than 20 largest influences.

Influence
Coefficient
TN
ID
Reaction Measured Quantity Reference
1.000488.1 HF (aq) → H+ (aq) F- (aq) ΔrH°(298.15 K) = 0.000 ± 0.000 kcal/moltriv
0.977489.1 HF (aq, undissoc) → HF (aq) ΔrH°(298.15 K) = -3.180 ± 0.015 kcal/molHepler 1953
0.880529.1 HF (aq, 5500 H2O) → HF (aq) ΔrH°(298.15 K) = -10.16 ± 0.10 kJ/molPaulechka 2020, Hefter 1984, Kleboth 1970, Baumann 1969, Hepler 1953, Ellis 1963, Broene 1947, Hamer 1970
0.2482149.1 NF3 (g) + 3/2 H2 (g) → 1/2 N2 (g) + 3 HF (aq) ΔrH°(298.15 K) = -871.8 ± 1.2 kJ/molArmstrong 1959
0.114537.3 HF (g) → HF (aq) ΔrH°(298.15 K) = -14.81 ± 0.10 kcal/molVanderzee 1971, Westrum 1949, Davis 1961, Ruterjans 1969
0.028537.2 HF (g) → HF (aq) ΔrH°(298.15 K) = -14.75 ± 0.20 kcal/molHood 1951, Vanderzee 1971, Parker 1965, est unc
0.028537.1 HF (g) → HF (aq) ΔrH°(298.15 K) = -14.82 ± 0.20 kcal/molKhaidukov 1936, Vanderzee 1971, Parker 1965, est unc
0.022489.2 HF (aq, undissoc) → HF (aq) ΔrH°(298.15 K) = -3.210 ± 0.100 kcal/molEllis 1969
0.000662.2 FOF (g) + 4 HBr (aq) → 2 HF (aq) H2O (cr,l) + 2 Br2 (cr,l) ΔrH°(298.15 K) = -124.8 ± 5.2 (×1.139) kcal/molWartenberg 1930, Wartenberg 1931, Parker 1965
0.000658.1 FOF (g) + 2 H2 (g) → 2 HF (aq) H2O (cr,l) ΔrH°(298.15 K) = -222.93 ± 2.2 (×5.187) kcal/molBisbee 1966, Bisbee 1965, King 1968


References
1   B. Ruscic, R. E. Pinzon, M. L. Morton, G. von Laszewski, S. Bittner, S. G. Nijsure, K. A. Amin, M. Minkoff, and A. F. Wagner,
Introduction to Active Thermochemical Tables: Several "Key" Enthalpies of Formation Revisited.
J. Phys. Chem. A 108, 9979-9997 (2004) [DOI: 10.1021/jp047912y]
2   B. Ruscic, R. E. Pinzon, G. von Laszewski, D. Kodeboyina, A. Burcat, D. Leahy, D. Montoya, and A. F. Wagner,
Active Thermochemical Tables: Thermochemistry for the 21st Century.
J. Phys. Conf. Ser. 16, 561-570 (2005) [DOI: 10.1088/1742-6596/16/1/078]
3   B. Ruscic and D. H. Bross,
Active Thermochemical Tables (ATcT) values based on ver. 1.172 of the Thermochemical Network (2024); available at ATcT.anl.gov
4   K. L. Caster, N. A. Seifert, B. Ruscic, A. W. Jasper, and K. Prozument,
Dynamics of HCN, NHC, and HNCO Formation in the 193 nm Photodissociation of Formamide
J. Phys. Chem. A (in press) (2024) [DOI: 10.1021/acs.jpca.4c02232]
5   B. Ruscic,
Uncertainty Quantification in Thermochemistry, Benchmarking Electronic Structure Computations, and Active Thermochemical Tables.
Int. J. Quantum Chem. 114, 1097-1101 (2014) [DOI: 10.1002/qua.24605]
6   B. Ruscic and D. H. Bross,
Thermochemistry
Computer Aided Chem. Eng. 45, 3-114 (2019) [DOI: 10.1016/B978-0-444-64087-1.00001-2]

Formula
The aggregate state is given in parentheses following the formula, such as: g - gas-phase, cr - crystal, l - liquid, etc.

Uncertainties
The listed uncertainties correspond to estimated 95% confidence limits, as customary in thermochemistry (see, for example, Ruscic [5] and Ruscic and Bross[6]).
Note that an uncertainty of ± 0.000 kJ/mol indicates that the estimated uncertainty is < ± 0.0005 kJ/mol.

Website Functionality Credits
The reorganization of the website was developed and implemented by David H. Bross (ANL).
The find function is based on the complete Species Dictionary entries for the appropriate version of the ATcT TN.
The molecule images are rendered by Indigo-depict.
The XYZ renderings are based on Jmol: an open-source Java viewer for chemical structures in 3D. http://www.jmol.org/.

Acknowledgement
This work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences under Contract No. DE-AC02-06CH11357.