Selected ATcT [1, 2] enthalpy of formation based on version 1.176 of the Thermochemical Network [3]

This version of ATcT results[3] was generated by additional expansion of version 1.172 to include species related to Criegee intermediates that are involved in several ongoing studies[4].

Hydrogen sulfide

Formula: H2S (g)

CAS RN: 7783-06-4

ATcT ID: 7783-06-4*0

SMILES: S

InChI: InChI=1S/H2S/h1H2

InChIKey: RWSOTUBLDIXVET-UHFFFAOYSA-N

Hills Formula: H2S1

2D Image:

Aliases: H2S; Hydrogen sulfide; Dihydrogen sulfide; Sulfur dihydride; Sulfur hydride; Hydrosulfuric acid; Dihydrogen monosulfide; Stink damp; Sulfureted hydrogen

Relative Molecular Mass: 34.0819 ± 0.0060

Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units
-17.37	-20.29	± 0.18	kJ/mol

3D Image of H2S (g)

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Top contributors to the provenance of Δ_fH° of H2S (g)

The 20 contributors listed below account only for 86.9% of the provenance of Δ_fH° of H2S (g).
A total of 24 contributors would be needed to account for 90% of the provenance.

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
23.1	9535.1	999 H2S (g) + 999 O2 (g) → 728 OSO (g) + 272 S (cr,l) + 999 H2O (cr,l)	Δ_rH°(298.15 K) = -115042 ± 60 kcal/mol	Kapustinskii 1958
14.0	9416.1	S (cr,l) + O2 (g) → OSO (g)	Δ_rH°(298.15 K) = -296.847 ± 0.200 kJ/mol	Eckman 1929, note SO2
9.6	9541.1	SH (g) → H (g) + S (g)	Δ_rH°(0 K) = 29245 ± 25 cm-1	Zhou 2005
7.5	9563.1	S (cr,l) + 3/2 O2 (g) + H2O (cr,l) → OS(O)(OH)2 (aq, 115 H2O)	Δ_rH°(298.15 K) = -143.85 ± 0.06 kcal/mol	Good 1960, CODATA Key Vals
5.5	9563.2	S (cr,l) + 3/2 O2 (g) + H2O (cr,l) → OS(O)(OH)2 (aq, 115 H2O)	Δ_rH°(298.15 K) = -143.92 ± 0.07 kcal/mol	Mansson 1963, CODATA Key Vals
3.0	9409.10	S2 (g) + 2 H2O (g) → O2 (g) + 2 H2S (g)	Δ_rH°(0 K) = 75.40 ± 0.25 kcal/mol	Karton 2006, Karton 2011
3.0	9409.11	S2 (g) + 2 H2O (g) → O2 (g) + 2 H2S (g)	Δ_rH°(0 K) = 75.51 ± 0.25 kcal/mol	Feller 2008
2.2	9401.2	2 S (cr,l) → S2 (g)	Δ_rG°(570 K) = 9.483 ± 0.138 (×1.915) kcal/mol	Drowart 1968, Detry 1967, 3rd Law
2.2	9537.1	H2S (g) + 3/2 O2 (g) → OSO (g) + H2O (cr,l)	Δ_rH°(298.15 K) = -134.24 ± 0.16 kcal/mol	Kapustinskii 1958
2.2	9602.1	S (cr,l) + 3/2 O2 (g) + H2O (cr,l) → OS(O)(OH)2 (aq, 45 H2O)	Δ_rH°(298.15 K) = -143.67 ± 0.11 kcal/mol	McCullough 1957a
2.0	9436.1	SO (g) → S (g) + O (g)	Δ_rH°(0 K) = 43275 ± 5 cm-1	Clerbaux 1994
1.8	9403.4	S2 (g) + 2 H2 (g) → 2 H2S (g)	Δ_rG°(1515 K) = -31.42 ± 0.80 (×1.719) kJ/mol	Randall 1918, Gurvich TPIS, 2nd Law
1.7	9401.4	2 S (cr,l) → S2 (g)	Δ_rG°(600 K) = 8.57 ± 0.29 (×1.044) kcal/mol	Braune 1951, West 1929, Gurvich TPIS, 3rd Law
1.5	9562.1	S (cr,l) + 3/2 O2 (g) + H2O (cr,l) → OS(O)(OH)2 (aq, 70 H2O)	Δ_rH°(298.15 K) = -143.58 ± 0.09 (×1.477) kcal/mol	McCullough 1953, CODATA Key Vals
1.2	9518.13	H2S (g) → 2 H (g) + S (g)	Δ_rH°(0 K) = 173.54 ± 0.20 kcal/mol	Feller 2008, McNeill 2022
1.2	9542.12	SH (g) → H (g) + S (g)	Δ_rH°(0 K) = 83.69 ± 0.20 kcal/mol	Feller 2008
1.2	9409.9	S2 (g) + 2 H2O (g) → O2 (g) + 2 H2S (g)	Δ_rH°(0 K) = 75.57 ± 0.40 kcal/mol	Karton 2011
1.0	9563.3	S (cr,l) + 3/2 O2 (g) + H2O (cr,l) → OS(O)(OH)2 (aq, 115 H2O)	Δ_rH°(298.15 K) = -143.70 ± 0.07 (×2.278) kcal/mol	Waddington 1956, Mansson 1963, est unc
1.0	9561.1	OSO (g) + 1/2 O2 (g) + H2O (cr,l) → OS(O)(OH)2 (cr,l)	Δ_rH°(298.15 K) = -231.329 ± 0.040 kJ/mol	NBS Tables 1989
0.9	9536.1	H2S (g) + 1/2 O2 (g) → S (cr,l) + H2O (cr,l)	Δ_rH°(298.15 K) = -63.66 ± 0.42 kcal/mol	Kapustinskii 1958

Top 10 species with enthalpies of formation correlated to the Δ_fH° of H2S (g)

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	Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units	Relative Molecular Mass	ATcT ID
99.5	Sulfoniumyl	[H2S]+ (g)	992.66	989.75	± 0.18	kJ/mol	34.0813 ± 0.0060	26453-60-1*0
99.3	Hydrosulfide	[SH]- (g)	-80.53	-80.53	± 0.18	kJ/mol	33.0745 ± 0.0060	15035-72-0*0
99.3	Sulfanyl	SH (g)	142.81	143.26	± 0.18	kJ/mol	33.0739 ± 0.0060	13940-21-1*0
97.4	Sulfanylium	[SH]+ (g)	1148.36	1148.36	± 0.19	kJ/mol	33.0734 ± 0.0060	12273-42-6*0
64.0	Monosulfur anion	S- (g)	76.42	78.48	± 0.14	kJ/mol	32.0665 ± 0.0060	14337-03-2*0
64.0	Sulfur	S (g)	276.83	279.08	± 0.14	kJ/mol	32.0660 ± 0.0060	7704-34-9*0
63.8	Monosulfur cation	S+ (g)	1276.42	1278.21	± 0.14	kJ/mol	32.0655 ± 0.0060	14701-12-3*0
63.8	Disulfur	S2 (g)	127.37	127.68	± 0.27	kJ/mol	64.1320 ± 0.0120	23550-45-0*0
62.8	Sulfur atom dication	[S]+2 (g)	3528.18	3531.88	± 0.14	kJ/mol	32.0649 ± 0.0060	14127-58-3*0
61.6	Sulfur monoxide	SO (g)	5.95	6.00	± 0.13	kJ/mol	48.0654 ± 0.0060	13827-32-2*0

Most Influential reactions involving H2S (g)

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
0.680	9548.2	H2S (g) → H+ (g) + [SH]- (g)	Δ_rH°(0 K) = 122458 ± 2 cm-1	Kreis 2022
0.472	9519.1	H2S (g) → [H2S]+ (g)	Δ_rH°(0 K) = 84432 ± 2 cm-1	Wiedmann 1992a
0.472	9519.2	H2S (g) → [H2S]+ (g)	Δ_rH°(0 K) = 84432 ± 2 cm-1	Fischer 1993
0.432	9521.4	[H2S]- (g) → H2S (g)	Δ_rH°(0 K) = -1.280 ± 0.050 eV	Ruscic W1RO
0.314	9535.1	999 H2S (g) + 999 O2 (g) → 728 OSO (g) + 272 S (cr,l) + 999 H2O (cr,l)	Δ_rH°(298.15 K) = -115042 ± 60 kcal/mol	Kapustinskii 1958
0.302	9548.1	H2S (g) → H+ (g) + [SH]- (g)	Δ_rH°(0 K) = 122458 ± 3 cm-1	Shiell 2000a
0.290	9521.2	[H2S]- (g) → H2S (g)	Δ_rH°(0 K) = -1.347 ± 0.061 eV	Ruscic G4
0.149	9521.1	[H2S]- (g) → H2S (g)	Δ_rH°(0 K) = -1.305 ± 0.085 eV	Ruscic G3X
0.127	9521.3	[H2S]- (g) → H2S (g)	Δ_rH°(0 K) = -1.269 ± 0.092 eV	Ruscic CBS-n
0.105	9824.4	CH3S(O)CH3 (g) + H2S (g) → CH3SCH3 (g) + H2SO (g)	Δ_rH°(0 K) = 21.02 ± 0.85 kcal/mol	Ruscic W1RO
0.094	9824.1	CH3S(O)CH3 (g) + H2S (g) → CH3SCH3 (g) + H2SO (g)	Δ_rH°(0 K) = 21.54 ± 0.90 kcal/mol	Ruscic G3X
0.094	9824.2	CH3S(O)CH3 (g) + H2S (g) → CH3SCH3 (g) + H2SO (g)	Δ_rH°(0 K) = 21.10 ± 0.90 kcal/mol	Ruscic G4
0.076	9824.3	CH3S(O)CH3 (g) + H2S (g) → CH3SCH3 (g) + H2SO (g)	Δ_rH°(0 K) = 20.73 ± 1.00 kcal/mol	Ruscic CBS-n
0.069	9409.11	S2 (g) + 2 H2O (g) → O2 (g) + 2 H2S (g)	Δ_rH°(0 K) = 75.51 ± 0.25 kcal/mol	Feller 2008
0.069	9409.10	S2 (g) + 2 H2O (g) → O2 (g) + 2 H2S (g)	Δ_rH°(0 K) = 75.40 ± 0.25 kcal/mol	Karton 2006, Karton 2011
0.066	9435.7	SOO (g) + H2O (g) → OOO (g) + H2S (g)	Δ_rH°(0 K) = 39.46 ± 1.2 kcal/mol	Ruscic W1RO
0.064	9810.4	CH3SCH3 (g) + H2S (g) → 2 CH3SH (g)	Δ_rH°(0 K) = 3.52 ± 0.85 kcal/mol	Ruscic W1RO
0.057	9810.1	CH3SCH3 (g) + H2S (g) → 2 CH3SH (g)	Δ_rH°(0 K) = 3.60 ± 0.90 kcal/mol	Ruscic G3X
0.057	9810.2	CH3SCH3 (g) + H2S (g) → 2 CH3SH (g)	Δ_rH°(0 K) = 3.54 ± 0.90 kcal/mol	Ruscic G4
0.056	9435.4	SOO (g) + H2O (g) → OOO (g) + H2S (g)	Δ_rH°(0 K) = 40.40 ± 1.3 kcal/mol	Ruscic G4

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 21^st 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. 1.176 of the Thermochemical Network (2024); available at ATcT.anl.gov
4		T. L. Nguyen et al, ongoing studies (2024)
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.