sulphur trioxide

• Formula: O₃S
• Molecular weight: 80.063
• IUPAC Standard InChI: InChI=1S/O3S/c1-4(2)3 Copy

  
• IUPAC Standard InChIKey: AKEJUJNQAAGONA-UHFFFAOYSA-N Copy
• CAS Registry Number: 7446-11-9
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
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• Other names: Sulfur trioxide
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Phase change data
  • Henry's Law data
  • Ion clustering data
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Vibrational and/or electronic energy levels
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

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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 (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/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 (atm)
    T = temperature (K)

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Enthalpy of fusion

Henry's Law data

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

Error: Bad or missing data.

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law 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

 +  = BrO₃S^-

By formula: Br^- + O₃S = BrO₃S^-

 +  = ( • )

By formula: Cl^- + O₃S = (Cl^- • O₃S)

 +  = ( • )

By formula: F^- + O₃S = (F^- • O₃S)

 +  = IO₃S^-

By formula: I^- + O₃S = IO₃S^-

(O₄S^- • 4294967295) +  = O₄S^-

By formula: (O₄S^- • 4294967295O₃S) + O₃S = O₄S^-

References

Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law 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.

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

Kondrat'ev and Strizhov, 1985
Kondrat'ev, S.N.; Strizhov, B.V., Zh. Fiz. Khim., 1985, 59, 2933. [all data]

Abercromby and Tiley, 1963
Abercromby, D.C.; Tiley, P.F., 937. The Condensed phases of sulphur trioxide. Part II. Vapour pressure of the liquid at temperatures up to the critical point, J. Chem. Soc., 1963, 4902, https://doi.org/10.1039/jr9630004902 . [all data]

Abercromby and Tiley, 1963, 2
Abercromby, D.C.; Tiley, P.F., The Condensed Phases of Sulphur Trioxide. Part II. Vapour Pressure of the Liquid at Temperatures up to the Critical Point, J. Chem. Soc., 1963, 4902-4904, https://doi.org/10.1039/jr9630004902 . [all data]

Kondrat'ev and Strizhov, 1989
Kondrat'ev, S.N.; Strizhov, B.V., Russ. J. Phys. Chem., 1989, 63, 656. [all data]

Hao, Gilbert, et al., 2006
Hao, C.; Gilbert, T.M.; Sunderlin, L.S., The Bond Dissociation Energies of SO3-X- (X = F, Cl, Br, and I), Can. J. Chem., 2006, 83, 11, 2013-2019, https://doi.org/10.1139/v05-216 . [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]

Wang, Nicholas, et al., 2000
Wang, X.B.; Nicholas, J.B.; Wang, L.S., Photoelectron spectroscopy and theoretical calculations of SO4- and HSO4-: Confirmation of high electron affinities of SO4 and HSO4, J. Phys. Chem. A, 2000, 104, 3, 504-508, https://doi.org/10.1021/jp992726r . [all data]

Notes

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

• Symbols used in this document:
  

  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  Tfus	Fusion (melting) point
  d(ln(kH))/d(1/T)	Temperature dependence parameter for Henry's Law constant
  k°H	Henry's Law constant at 298.15K
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfusH	Enthalpy of fusion
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions

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