hydrogen fluoride

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Gas phase thermochemistry data

Go To: Top, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, References, Notes

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

Quantity Value Units Method Reference Comment
Δfgas-273.30 ± 0.70kJ/molReviewCox, Wagman, et al., 1984CODATA Review value
Δfgas-272.55kJ/molReviewChase, 1998Data last reviewed in June, 1977
Quantity Value Units Method Reference Comment
gas,1 bar173.779 ± 0.003J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
gas,1 bar173.78J/mol*KReviewChase, 1998Data last reviewed in June, 1977

Gas Phase Heat Capacity (Shomate Equation)

Cp° = 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
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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View table.

Temperature (K) 298. to 1000.1000. to 6000.
A 30.1169324.57033
B -3.2466126.893391
C 2.868116-1.243874
D 0.4579140.082583
E -0.024861-0.234060
F -281.4912-279.7653
G 210.9226202.8525
H -272.5462-272.5462
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1977 Data last reviewed in June, 1977

Phase change data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, References, Notes

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

Quantity Value Units Method Reference Comment
Tboil292.7KN/AStreng, 1971Uncertainty assigned by TRC = 0.25 K; TRC
Quantity Value Units Method Reference Comment
Tfus190.KN/AStreng, 1971Uncertainty assigned by TRC = 0.2 K; TRC

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Reference Comment
25.2265.Campbell and Campbell, 1934Based on data from 240. to 290. K.; AC
25.2255.Simons, 1924Based on data from 190. to 320. K.; AC

Antoine Equation Parameters

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

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Temperature (K) A B C Reference Comment
273.17 to 303.094.91481556.55924.199Sheft, Perkins, et al., 1973Coefficents calculated by NIST from author's data.
198.5 to 292.94.161291142.985-17.993Stull, 1947Coefficents calculated by NIST from author's data.

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, References, Notes

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:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

Fluorine anion + Hydrogen cation = hydrogen fluoride

By formula: F- + H+ = HF

Quantity Value Units Method Reference Comment
Δr1555. ± 5.kJ/molAVGN/AAverage of 6 out of 7 values; Individual data points
Quantity Value Units Method Reference Comment
Δr1530.0 ± 0.75kJ/molH-TSBlondel, Delsart, et al., 2001gas phase; Given: 3.4011895(25) eV, or 27432.446(19) cm-1, or 78.433266(577) kcal/mol; B
Δr1529.4kJ/molH-TSMartin and Hepburn, 2000gas phase; Given: 371.334±0.003 kcal/mol (corr to 298K with data from Wagman, Evans, et al., 1982).H(0K)=370.422±0.003; B
Δr1530.0 ± 0.75kJ/molH-TSBlondel, Cacciani, et al., 1989gas phase; Reported: 3.401190±0.000004 eV. acidity includes 0.9 kcal 0 to 298 K correction.; B
Δr1529. ± 8.4kJ/molIMREBierbaum, Schmidt, et al., 1981gas phase; B
Δr1503.7kJ/molN/ACheck, Faust, et al., 2001gas phase; FeCl3-; ; ΔS(EA)=5.0; B

Fluorine anion + hydrogen fluoride = (Fluorine anion • hydrogen fluoride)

By formula: F- + HF = (F- • HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr192. ± 6.7kJ/molCIDCWenthold and Squires, 1995gas phase; B
Δr162. ± 8.4kJ/molIMRELarson and McMahon, 1983gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Δr>145. ± 19.kJ/molTherHeni and Illenberger, 1985gas phase; From CHF=CHF. Outdataed HC2. thermo used. Current value ( Berkowitz, Ellison, et al., 1994) implies Haff>57.; B
Quantity Value Units Method Reference Comment
Δr91.6J/mol*KN/ALarson and McMahon, 1983gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity Value Units Method Reference Comment
Δr134. ± 8.4kJ/molIMRELarson and McMahon, 1983gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
134.289.ICRLarson and McMahon, 1983gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M

Chlorine anion + hydrogen fluoride = (Chlorine anion • hydrogen fluoride)

By formula: Cl- + HF = (Cl- • HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr91.2 ± 8.4kJ/molIMRELarson and McMahon, 1984gas phase; B,M
Quantity Value Units Method Reference Comment
Δr94.1J/mol*KN/ALarson and McMahon, 1984gas phase; switching reaction(Cl-)SO2, Entropy change calculated or estimated; Larson and McMahon, 1984, 2; M
Quantity Value Units Method Reference Comment
Δr63.2 ± 8.4kJ/molIMRELarson and McMahon, 1984gas phase; B,M

Bromine anion + hydrogen fluoride = (Bromine anion • hydrogen fluoride)

By formula: Br- + HF = (Br- • HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr71.1 ± 8.4kJ/molEstLarson and McMahon, 1984, 3gas phase; Extrapolated from other bihalide data; B
Δr71.1kJ/molHPMSCaldwell, Masucci, et al., 1989gas phase; M

Iodide + hydrogen fluoride = (Iodide • hydrogen fluoride)

By formula: I- + HF = (I- • HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr62.8 ± 8.4kJ/molEstLarson and McMahon, 1984, 3gas phase; Extrapolated from other bihalide data; B
Δr63.kJ/molPHPMSCaldwell, Masucci, et al., 1989gas phase; M

Tetrafluoromethane + 2Water = Carbon dioxide + 4hydrogen fluoride

By formula: CF4 + 2H2O = CO2 + 4HF

Quantity Value Units Method Reference Comment
Δr-174. ± 4.2kJ/molCmGood, Scott, et al., 1956gas phase; HF has 10 moles H2O, see Scott, Good, et al., 1955; ALS
Δr-174. ± 4.2kJ/molCmScott, Good, et al., 1955gas phase; Heat of hydrolysis; ALS

Hydrogen + Propane, 2-fluoro- = Propane + hydrogen fluoride

By formula: H2 + C3H7F = C3H8 + HF

Quantity Value Units Method Reference Comment
Δr-84.5 ± 1.3kJ/molChydLacher, Kianpour, et al., 1956gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -88.3 ± 2.9 kJ/mol; %hf298_gas[kcal/mol]=-66.97±0.71; Kolesov and Kozina, 1986; ALS

Hydrogen + n-Propyl fluoride = Propane + hydrogen fluoride

By formula: H2 + C3H7F = C3H8 + HF

Quantity Value Units Method Reference Comment
Δr-92.0 ± 2.1kJ/molChydLacher, Kianpour, et al., 1956gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -95.7 ± 6.7 kJ/mol; %hf298_gas[kcal/mol]=-66.71±0.62; Kolesov and Kozina, 1986; ALS

2-Fluoro-N-(2-fluoro-2,2-dinitroethyl)-N,2,2-trinitroethylamine + 6Oxygen + Ethanedioic acid, diethyl ester = 10Carbon dioxide + 2hydrogen fluoride + 3Nitrogen + 6Water

By formula: C4H4F2N6O10 + 6O2 + C6H10O4 = 10CO2 + 2HF + 3N2 + 6H2O

Quantity Value Units Method Reference Comment
Δr-4976.2 ± 2.3kJ/molCcrBaroody and Carpenter, 1973solid phase; Corrected for CODATA value of ΔfH; HF.100H2O; ALS

C4F9O- + hydrogen fluoride = (C4F9O- • hydrogen fluoride)

By formula: C4F9O- + HF = (C4F9O- • HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr71.kJ/molICRLarson and McMahon, 1983gas phase; M

C3HF6O- + hydrogen fluoride = (C3HF6O- • hydrogen fluoride)

By formula: C3HF6O- + HF = (C3HF6O- • HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr100.kJ/molICRLarson and McMahon, 1983gas phase; M

C4H3F6O- + hydrogen fluoride = (C4H3F6O- • hydrogen fluoride)

By formula: C4H3F6O- + HF = (C4H3F6O- • HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr110.kJ/molICRLarson and McMahon, 1983gas phase; M

Carbonic difluoride + Water = Carbon dioxide + 2hydrogen fluoride

By formula: CF2O + H2O = CO2 + 2HF

Quantity Value Units Method Reference Comment
Δr-111.8 ± 1.0kJ/molCcrWartenberg, 1949gas phase; solvent: Gas phase;; Corrected for CODATA value of ΔfH; ALS

Ethane, 2-chloro-1,1,1,2-tetrafluoro- + hydrogen fluoride = Ethane, pentafluoro- + Hydrogen chloride

By formula: C2HClF4 + HF = C2HF5 + HCl

Quantity Value Units Method Reference Comment
Δr-10.5 ± 6.3kJ/molKinCoulson, 1993gas phase; solvent: On solid catalyst; ALS

Ethane, 2-chloro-1,1,1,2-tetrafluoro- + Hydrogen chloride = Ethane, 2,2-dichloro-1,1,1-trifluoro- + hydrogen fluoride

By formula: C2HClF4 + HCl = C2HCl2F3 + HF

Quantity Value Units Method Reference Comment
Δr-1.7 ± 5.9kJ/molKinCoulson, 1993gas phase; solvent: On solid catalyst; ALS

(H2F+ • hydrogen fluoride) + hydrogen fluoride = (H2F+ • 2hydrogen fluoride)

By formula: (H2F+ • HF) + HF = (H2F+ • 2HF)

Quantity Value Units Method Reference Comment
Δr62. ± 18.kJ/molPITiedemann, Anderson, et al., 1979gas phase; M

Ethene, tetrafluoro- + 2Hydrogen = 2carbon + 4hydrogen fluoride

By formula: C2F4 + 2H2 = 2C + 4HF

Quantity Value Units Method Reference Comment
Δr-618.4 ± 4.6kJ/molChydNeugebauer and Margrave, 1956gas phase; ALS

Hydrogen fluoride, positive ion + hydrogen fluoride = (Hydrogen fluoride, positive ion • hydrogen fluoride)

By formula: HF+ + HF = (HF+ • HF)

Quantity Value Units Method Reference Comment
Δr140.kJ/molPITiedemann, Anderson, et al., 1979gas phase; ΔrH>; M

Tetrafluoromethane + 4hydrogen fluoride = Methane + 4fluorine

By formula: CF4 + 4HF = CH4 + 4F2

Quantity Value Units Method Reference Comment
Δr-1922. ± 13.kJ/molCmJessup, McCoskey, et al., 1955gas phase; ALS

H2F+ + hydrogen fluoride = (H2F+ • hydrogen fluoride)

By formula: H2F+ + HF = (H2F+ • HF)

Quantity Value Units Method Reference Comment
Δr105. ± 10.kJ/molPITiedemann, Anderson, et al., 1979gas phase; M

Ethene, fluoro- + hydrogen fluoride = Ethane, 1,1-difluoro-

By formula: C2H3F + HF = C2H4F2

Quantity Value Units Method Reference Comment
Δr-50.kJ/molEqkMoore, 1971gas phase; ALS

Henry's Law data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, References, Notes

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

Data compiled by: Rolf Sander

Henry's Law constant (water solution)

kH(T) = H exp(d(ln(kH))/d(1/T) ((1/T) - 1/(298.15 K)))
H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(kH))/d(1/T) = Temperature dependence constant (K)

H (mol/(kg*bar)) d(ln(kH))/d(1/T) (K) Method Reference Comment
9.6/KA7400.TN/AFor strong acids, the solubility is often expressed as kH = ([H+] * [A-]) / p(HA). To obtain the physical solubility of HA, the value has to be divided by the acidity constant KA. missing citation corrects erroneous data from missing citation.

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Ion clustering data, References, Notes

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

Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
LL - Sharon G. Lias and Joel F. Liebman

Quantity Value Units Method Reference Comment
IE (evaluated)16.03 ± 0.04eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)484.kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity456.7kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
16.06PEBieri, Schmelzer, et al., 1980LLK
15.98 ± 0.04PITiedemann, Anderson, et al., 1979LLK
16.05EIFoner and Hudson, 1978LLK
15.98 ± 0.04PINg, Trevor, et al., 1977LLK
16. ± 1.EIFarber and Srivastava, 1977LLK
16.039TEGuyon, Spohr, et al., 1976LLK
16.05 ± 0.04AUGShaw and Thomas, 1975LLK
16.1PEDebies and Rabalais, 1975LLK
16.044 ± 0.003PEWalker, Dehmer, et al., 1973LLK
16.03 ± 0.01PEBerkowitz, 1971LLK
16.007 ± 0.010PIBerkowitz, Chupka, et al., 1971LLK
16.05 ± 0.01PEBrundle, 1970RDSH
15.92 ± 0.01PIDibeler, Walker, et al., 1969RDSH
16.05 ± 0.01PELempka, Passmore, et al., 1968RDSH
16.06 ± 0.01PEFrost, McDowell, et al., 1967RDSH
16.12 ± 0.04PEBanna and Shirley, 1975Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
H+19.42 ± 0.01FPIBerkowitz, Ellison, et al., 1994LL
H+19.444FPIBerkowitz and Wahl, 1973LLK
H+16.061 ± 0.005F-PIBerkowitz, Chupka, et al., 1971LLK
H+19.45 ± 0.01FPIBerkowitz, Chupka, et al., 1971, 2LLK
H+>19.44 ± 0.02FPEBrundle, 1970RDSH

De-protonation reactions

Fluorine anion + Hydrogen cation = hydrogen fluoride

By formula: F- + H+ = HF

Quantity Value Units Method Reference Comment
Δr1555. ± 5.kJ/molAVGN/AAverage of 6 out of 7 values; Individual data points
Quantity Value Units Method Reference Comment
Δr1530.0 ± 0.75kJ/molH-TSBlondel, Delsart, et al., 2001gas phase; Given: 3.4011895(25) eV, or 27432.446(19) cm-1, or 78.433266(577) kcal/mol; B
Δr1529.4kJ/molH-TSMartin and Hepburn, 2000gas phase; Given: 371.334±0.003 kcal/mol (corr to 298K with data from Wagman, Evans, et al., 1982).H(0K)=370.422±0.003; B
Δr1530.0 ± 0.75kJ/molH-TSBlondel, Cacciani, et al., 1989gas phase; Reported: 3.401190±0.000004 eV. acidity includes 0.9 kcal 0 to 298 K correction.; B
Δr1529. ± 8.4kJ/molIMREBierbaum, Schmidt, et al., 1981gas phase; B
Δr1503.7kJ/molN/ACheck, Faust, et al., 2001gas phase; FeCl3-; ; ΔS(EA)=5.0; B

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, References, Notes

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:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

Bromine anion + hydrogen fluoride = (Bromine anion • hydrogen fluoride)

By formula: Br- + HF = (Br- • HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr71.1 ± 8.4kJ/molEstLarson and McMahon, 1984, 3gas phase; Extrapolated from other bihalide data; B
Δr71.1kJ/molHPMSCaldwell, Masucci, et al., 1989gas phase; M

C3HF6O- + hydrogen fluoride = (C3HF6O- • hydrogen fluoride)

By formula: C3HF6O- + HF = (C3HF6O- • HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr100.kJ/molICRLarson and McMahon, 1983gas phase; M

C4F9O- + hydrogen fluoride = (C4F9O- • hydrogen fluoride)

By formula: C4F9O- + HF = (C4F9O- • HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr71.kJ/molICRLarson and McMahon, 1983gas phase; M

C4H3F6O- + hydrogen fluoride = (C4H3F6O- • hydrogen fluoride)

By formula: C4H3F6O- + HF = (C4H3F6O- • HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr110.kJ/molICRLarson and McMahon, 1983gas phase; M

Chlorine anion + hydrogen fluoride = (Chlorine anion • hydrogen fluoride)

By formula: Cl- + HF = (Cl- • HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr91.2 ± 8.4kJ/molIMRELarson and McMahon, 1984gas phase; B,M
Quantity Value Units Method Reference Comment
Δr94.1J/mol*KN/ALarson and McMahon, 1984gas phase; switching reaction(Cl-)SO2, Entropy change calculated or estimated; Larson and McMahon, 1984, 2; M
Quantity Value Units Method Reference Comment
Δr63.2 ± 8.4kJ/molIMRELarson and McMahon, 1984gas phase; B,M

Fluorine anion + hydrogen fluoride = (Fluorine anion • hydrogen fluoride)

By formula: F- + HF = (F- • HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr192. ± 6.7kJ/molCIDCWenthold and Squires, 1995gas phase; B
Δr162. ± 8.4kJ/molIMRELarson and McMahon, 1983gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Δr>145. ± 19.kJ/molTherHeni and Illenberger, 1985gas phase; From CHF=CHF. Outdataed HC2. thermo used. Current value ( Berkowitz, Ellison, et al., 1994) implies Haff>57.; B
Quantity Value Units Method Reference Comment
Δr91.6J/mol*KN/ALarson and McMahon, 1983gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity Value Units Method Reference Comment
Δr134. ± 8.4kJ/molIMRELarson and McMahon, 1983gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
134.289.ICRLarson and McMahon, 1983gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M

Hydrogen fluoride, positive ion + hydrogen fluoride = (Hydrogen fluoride, positive ion • hydrogen fluoride)

By formula: HF+ + HF = (HF+ • HF)

Quantity Value Units Method Reference Comment
Δr140.kJ/molPITiedemann, Anderson, et al., 1979gas phase; ΔrH>; M

H2F+ + hydrogen fluoride = (H2F+ • hydrogen fluoride)

By formula: H2F+ + HF = (H2F+ • HF)

Quantity Value Units Method Reference Comment
Δr105. ± 10.kJ/molPITiedemann, Anderson, et al., 1979gas phase; M

(H2F+ • hydrogen fluoride) + hydrogen fluoride = (H2F+ • 2hydrogen fluoride)

By formula: (H2F+ • HF) + HF = (H2F+ • 2HF)

Quantity Value Units Method Reference Comment
Δr62. ± 18.kJ/molPITiedemann, Anderson, et al., 1979gas phase; M

Iodide + hydrogen fluoride = (Iodide • hydrogen fluoride)

By formula: I- + HF = (I- • HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr62.8 ± 8.4kJ/molEstLarson and McMahon, 1984, 3gas phase; Extrapolated from other bihalide data; B
Δr63.kJ/molPHPMSCaldwell, Masucci, et al., 1989gas phase; M

References

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering 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]

Blondel, Delsart, et al., 2001
Blondel, C.; Delsart, C.; Goldfarb, F., Electron spectrometry at the mu eV level and the electron affinities of Si and F, J. Phys. B: Atom. Mol. Opt. Phys., 2001, 34, 9, L281-L288, https://doi.org/10.1088/0953-4075/34/9/101 . [all data]

Martin and Hepburn, 2000
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Wagman, Evans, et al., 1982
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Notes

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