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Methanethiol

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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, Kenneth Kroenlein director
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
DH - Eugene S. Domalski and Elizabeth D. Hearing
CAL - James S. Chickos, William E. Acree, Jr., Joel F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis

Quantity Value Units Method Reference Comment
Tboil279.1 ± 0.5KAVGN/AAverage of 6 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus150.18KN/AMorris, Lanum, et al., 1960Uncertainty assigned by TRC = 0.02 K; TRC
Tfus150.1KN/ATeets, 1934Uncertainty assigned by TRC = 0.5 K; TRC
Tfus150.1KN/AEllis and Reid, 1932Uncertainty assigned by TRC = 0.4 K; TRC
Tfus152.15KN/ATimmermans and Mattaar, 1921Uncertainty assigned by TRC = 0.6 K; TRC
Quantity Value Units Method Reference Comment
Ttriple150.14KN/ARussell, Osborne, et al., 1942Crystal phase 1 phase; Uncertainty assigned by TRC = 0.05 K; TRC
Ttriple150.16KN/ARussell, Osborne, et al., 1942Crystal phase 1 phase; Uncertainty assigned by TRC = 0.03 K; TRC
Quantity Value Units Method Reference Comment
Tc469.9KN/ABerthoud and Brum, 1924Uncertainty assigned by TRC = 0.4 K; by disappearance of meniscus turbidity; TRC
Tc469.9KN/ABerthoud and Brum, 1924Uncertainty assigned by TRC = 0.4 K; by appearance of turbidity; TRC
Quantity Value Units Method Reference Comment
Pc72.30barN/ABerthoud and Brum, 1924Uncertainty assigned by TRC = 0.5066 bar; vapor pressure at Tc; TRC
Quantity Value Units Method Reference Comment
rhoc6.891mol/lN/ABerthoud and Brum, 1924Uncertainty assigned by TRC = 0.04 mol/l; TRC
Quantity Value Units Method Reference Comment
Deltavap23.8kJ/molN/AReid, 1972AC
Deltavap23.8 ± 0.08kJ/molVGood, Lacina, et al., 1961ALS
Deltavap23.9kJ/molN/AGood, Lacina, et al., 1961DRB

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
24.568279.12N/ARussell, Osborne, et al., 1942, 2P = 101.325 kPa; DH
27.2223.N/ADykyj, Svoboda, et al., 1999Based on data from 208. - 298. K.; AC
25.2359.AStephenson and Malanowski, 1987Based on data from 267. - 359. K.; AC
25.7268.AStephenson and Malanowski, 1987Based on data from 221. - 283. K.; AC
23.7360.AStephenson and Malanowski, 1987Based on data from 345. - 424. K.; AC
24.2429.AStephenson and Malanowski, 1987Based on data from 414. - 470. K.; AC
25.8264.N/AStephenson and Malanowski, 1987Based on data from 222. - 279. K. See also Russell, Osborne, et al., 1942, 2.; AC

Entropy of vaporization

DeltavapS (J/mol*K) Temperature (K) Reference Comment
88.02279.12Russell, Osborne, et al., 1942, 2P; DH

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
279.9 - 458.4.353811122.494-21.748Stull, 1947Coefficents calculated by NIST from author's data.
221.87 - 279.134.192011031.431-32.72Russell, Osborne, et al., 1942, 2Coefficents calculated by NIST from author's data.

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Reference Comment
5.9150.2Domalski and Hearing, 1996AC

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
1.59137.6Domalski and Hearing, 1996CAL
39.33150.2

Enthalpy of phase transition

DeltaHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
0.2197137.6crystaline, IIcrystaline, IRussell, Osborne, et al., 1942, 2DH
5.904150.16crystaline, IliquidRussell, Osborne, et al., 1942, 2DH

Entropy of phase transition

DeltaStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
1.60137.6crystaline, IIcrystaline, IRussell, Osborne, et al., 1942, 2DH
39.32150.16crystaline, IliquidRussell, Osborne, et al., 1942, 2DH

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:


References

Go To: Top, Phase change data, Notes

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

Morris, Lanum, et al., 1960
Morris, J.C.; Lanum, W.J.; Helm, R.V.; Haines, W.E.; Cook, G.L.; Ball, J.S., Purification and Properties of Ten Organic Sulfur Compounds, J. Chem. Eng. Data, 1960, 5, 112-6. [all data]

Teets, 1934
Teets, D.E., The Relation of the Melting Point to the Number of Carbon Atoms in a Series of Normal Mercaptans, J. Am. Chem. Soc., 1934, 56, 1143. [all data]

Ellis and Reid, 1932
Ellis, L.M.; Reid, E.E., The Preparation and Properties of A Double Series of Aliphatic Mercaptans, J. Am. Chem. Soc., 1932, 54, 1674. [all data]

Timmermans and Mattaar, 1921
Timmermans, J.; Mattaar, J.F., Freezing points of orgainic substances VI. New experimental determinations., Bull. Soc. Chim. Belg., 1921, 30, 213. [all data]

Russell, Osborne, et al., 1942
Russell, H.; Osborne, D.W.; Yost, D.M., The Heat Capacity, Entropy, Heats of Fusion, Transition and Vaporization and Vapor Pressures of Methyl Mercaptan, J. Am. Chem. Soc., 1942, 64, 165-9. [all data]

Berthoud and Brum, 1924
Berthoud, A.; Brum, R., Physical Properties of Some Organic Compounds., J. Chim. Phys. Phys.-Chim. Biol., 1924, 21, 143-60. [all data]

Reid, 1972
Reid, Robert C., Handbook on vapor pressure and heats of vaporization of hydrocarbons and related compounds, R. C. Wilhort and B. J. Zwolinski, Texas A Research Foundation. College Station, Texas(1971). 329 pages.$10.00, AIChE J., 1972, 18, 6, 1278-1278, https://doi.org/10.1002/aic.690180637 . [all data]

Good, Lacina, et al., 1961
Good, W.D.; Lacina, J.L.; McCullough, J.P., Methanethiol and carbon disulfide: Heats of combustion and formation by rotating-bomb calorimetry, J. Phys. Chem., 1961, 65, 2229-2231. [all data]

Russell, Osborne, et al., 1942, 2
Russell, H., Jr.; Osborne, D.W.; Yost, D.M., The heat capacity, entropy, heats of fusion, transition, and vaporization and vapor pressures of methyl mercaptan, J. Am. Chem. Soc., 1942, 64, 165-169. [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]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [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]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]


Notes

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