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fluorosulphuric acid


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.

Quantity Value Units Method Reference Comment
Deltafgas-753.12kJ/molReviewChase, 1998Data last reviewed in June, 1972
Quantity Value Units Method Reference Comment
gas,1 bar297.26J/mol*KReviewChase, 1998Data last reviewed in June, 1972

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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Temperature (K) 298. - 1100.1100. - 6000.
A 39.47412121.6824
B 182.33505.915214
C -152.9219-1.141158
D 47.857010.076383
E -0.559748-10.68782
F -773.6174-816.3737
G 293.8913405.2991
H -753.1200-753.1200
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1972 Data last reviewed in June, 1972

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 by: William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Reference Comment
55.7358.Dykyj, Svoboda, et al., 1999Based on data from 343. - 459. K.

Reaction 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.

Data compiled by: John E. Bartmess

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

FO3S- + Hydrogen cation = fluorosulphuric acid

By formula: FO3S- + H+ = HFO3S

Quantity Value Units Method Reference Comment
Deltar1285. ± 11.kJ/molG+TSViggiano, Henchman, et al., 1992gas phase
Deltar1301.7kJ/molAcidLarson and McMahon, 1985gas 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.
Deltar<1312. ± 8.4kJ/molEIAEAdams, Smith, et al., 1986gas phase; From FSO3H (AP 0eV)
Quantity Value Units Method Reference Comment
Deltar1255. ± 10.kJ/molIMRBViggiano, Henchman, et al., 1992gas phase
Deltar1272.0 ± 1.3kJ/molH-TSLarson and McMahon, 1985gas 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.
Deltar<1282. ± 13.kJ/molH-TSAdams, Smith, et al., 1986gas phase; From FSO3H (AP 0eV)

Gas phase ion energetics 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 by: John E. Bartmess

De-protonation reactions

FO3S- + Hydrogen cation = fluorosulphuric acid

By formula: FO3S- + H+ = HFO3S

Quantity Value Units Method Reference Comment
Deltar1285. ± 11.kJ/molG+TSViggiano, Henchman, et al., 1992gas phase
Deltar1301.7kJ/molAcidLarson and McMahon, 1985gas 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.
Deltar<1312. ± 8.4kJ/molEIAEAdams, Smith, et al., 1986gas phase; From FSO3H (AP 0eV)
Quantity Value Units Method Reference Comment
Deltar1255. ± 10.kJ/molIMRBViggiano, Henchman, et al., 1992gas phase
Deltar1272.0 ± 1.3kJ/molH-TSLarson and McMahon, 1985gas 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.
Deltar<1282. ± 13.kJ/molH-TSAdams, Smith, et al., 1986gas phase; From FSO3H (AP 0eV)

References

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, NIST Free Links, Notes

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

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

Dykyj, Svoboda, et al., 1999
Dykyj, J.; Svoboda, J.; Wilhoit, R.C.; Frenkel, M.L.; Hall, K.R., Vapor Pressure of Chemicals: Part A. Vapor Pressure and Antoine Constants for Hydrocarbons and Sulfur, Selenium, Tellurium and Hydrogen Containing Organic Compounds, Springer, Berlin, 1999, 373. [all data]

Viggiano, Henchman, et al., 1992
Viggiano, A.A.; Henchman, M.J.; Dale, F.; Deakyne, C.A.; Paulson, J.F., Gas-Phase Reactions of Weak Bronsted Bases I-, PO3-, HSO4-, FSO3-, and CF3SO3- with Strong Bronsted Acids H2SO4, FSO3H, and CF3SO3H - A Quantitative Study, J. Am. Chem. Soc., 1992, 114, 11, 4299, https://doi.org/10.1021/ja00037a039 . [all data]

Larson and McMahon, 1985
Larson, J.W.; McMahon, T.B., Fluoride and chloride affinities of the main group oxides, fluorides, oxofluorides, and alkyls. Quantitative scales of lewis acidities from ICR halide exchange equilibria, J. Am. Chem. Soc., 1985, 107, 766. [all data]

Wenthold and Squires, 1995
Wenthold, P.G.; Squires, R.R., Bond dissociation energies of F2(-) and HF2(-). A gas-phase experimental and G2 theoretical study, J. Phys. Chem., 1995, 99, 7, 2002, https://doi.org/10.1021/j100007a034 . [all data]

Adams, Smith, et al., 1986
Adams, N.G.; Smith, D.; Viggiano, A.A.; Paulson, J.F.; Henchman, M.J., Dissociative attachment reactions of electron with strong acid molecules, J. Chem. Phys., 1986, 84, 6728. [all data]


Notes

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