Hydrogen sulfide

• Formula: H₂S
• Molecular weight: 34.081
• IUPAC Standard InChI: InChI=1S/H2S/h1H2 Copy

  
• IUPAC Standard InChIKey: RWSOTUBLDIXVET-UHFFFAOYSA-N Copy
• CAS Registry Number: 7783-06-4
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: Dihydrogen monosulfide; Dihydrogen sulfide; Hydrosulfuric acid; Stink damp; Sulfur hydride; Sulfureted hydrogen; H2S; Sulfuretted hydrogen; Hydrogen sulphide; Hydrogen sulfide (H2S); Acide sulfhydrique; Hydrogene sulfure; Idrogeno solforato; Rcra waste number U135; Schwefelwasserstoff; Siarkowodor; UN 1053; Zwavelwaterstof; Hepatic gas; Hepatic acid; Hydrogen monosulfide; Sewer gas
• 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
  • Gas phase ion energetics data
  • Ion clustering data
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data
  • Henry's Law data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Vibrational and/or electronic energy levels
  • Gas Chromatography
  • Fluid Properties
• Data at other public NIST sites:
  • Microwave spectra (on physics lab web site)
  • Electron-Impact Ionization Cross Sections (on physics web site)
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
• Options:
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Data at NIST subscription sites:

• NIST / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data)
• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

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Gas phase thermochemistry data

Go To: Top, Phase change 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.

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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View table.

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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Enthalpy of sublimation

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 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
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to H₂S⁺ (ion structure unspecified)

Ionization energy determinations

Appearance energy determinations

De-protonation reactions

HS^- +  =

By formula: HS^- + H⁺ = H₂S

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

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

CH₆N⁺ +  = (CH₆N⁺ • )

By formula: CH₆N⁺ + H₂S = (CH₆N⁺ • H₂S)

Bond type: Hydrogen bond (positive ion to hydride)

Free energy of reaction

CN^- +  = (CN^- • )

By formula: CN^- + H₂S = (CN^- • H₂S)

C₃H₇⁺ +  = (C₃H₇⁺ • )

By formula: C₃H₇⁺ + H₂S = (C₃H₇⁺ • H₂S)

 +  = ( • )

By formula: F^- + H₂S = (F^- • H₂S)

Bond type: Hydrogen bond (negative ion to hydride)

F₅S^- +  = (F₅S^- • )

By formula: F₅S^- + H₂S = (F₅S^- • H₂S)

HS^- +  = (HS^- • )

By formula: HS^- + H₂S = (HS^- • H₂S)

H₂S⁺ +  = (H₂S⁺ • )

By formula: H₂S⁺ + H₂S = (H₂S⁺ • H₂S)

(H₂S⁺ • ) +  = (H₂S⁺ • 2)

By formula: (H₂S⁺ • H₂S) + H₂S = (H₂S⁺ • 2H₂S)

(H₂S⁺ • 2) +  = (H₂S⁺ • 3)

By formula: (H₂S⁺ • 2H₂S) + H₂S = (H₂S⁺ • 3H₂S)

(H₂S⁺ • 3) +  = (H₂S⁺ • 4)

By formula: (H₂S⁺ • 3H₂S) + H₂S = (H₂S⁺ • 4H₂S)

(H₂S⁺ • 4) +  = (H₂S⁺ • 5)

By formula: (H₂S⁺ • 4H₂S) + H₂S = (H₂S⁺ • 5H₂S)

H₃S⁺ +  = (H₃S⁺ • )

By formula: H₃S⁺ + H₂S = (H₃S⁺ • H₂S)

Bond type: Hydrogen bond (positive ion to hydride)

(H₃S⁺ • ) +  = (H₃S⁺ • 2)

By formula: (H₃S⁺ • H₂S) + H₂S = (H₃S⁺ • 2H₂S)

Bond type: Hydrogen bond (positive ion to hydride)

(H₃S⁺ • 2) +  = (H₃S⁺ • 3)

By formula: (H₃S⁺ • 2H₂S) + H₂S = (H₃S⁺ • 3H₂S)

Bond type: Hydrogen bond (positive ion to hydride)

(H₃S⁺ • 3) +  = (H₃S⁺ • 4)

By formula: (H₃S⁺ • 3H₂S) + H₂S = (H₃S⁺ • 4H₂S)

Bond type: Hydrogen bond (positive ion to hydride)

(H₃S⁺ • 4) +  = (H₃S⁺ • 5)

By formula: (H₃S⁺ • 4H₂S) + H₂S = (H₃S⁺ • 5H₂S)

Bond type: Hydrogen bond (positive ion to hydride)

Free energy of reaction

 +  = ( • )

By formula: H₄N⁺ + H₂S = (H₄N⁺ • H₂S)

Bond type: Hydrogen bond (positive ion to hydride)

 +  = ( • )

By formula: I^- + H₂S = (I^- • H₂S)

Bond type: Hydrogen bond (negative ion to hydride)

 +  = H₂NOS^-

By formula: NO^- + H₂S = H₂NOS^-

References

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

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Notes

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

• Symbols used in this document:
  

  AE	Appearance energy
  IE (evaluated)	Recommended ionization energy
  Pc	Critical pressure
  Ptriple	Triple point pressure
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  T	Temperature
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔrS°	Entropy of reaction at standard conditions
  ΔsubH	Enthalpy of sublimation
  ΔvapH	Enthalpy of vaporization
  ρc	Critical density

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