Methane, bromo-
- Formula: CH3Br
- Molecular weight: 94.939
- IUPAC Standard InChIKey: GZUXJHMPEANEGY-UHFFFAOYSA-N
- CAS Registry Number: 74-83-9
- 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. - Isotopologues:
- Other names: Bromomethane; Curafume; Embafume; Halon 1001; Haltox; Iscobrome; Methyl bromide; Monobromomethane; Terabol; CH3Br; Bercema; Brom-methan; Brom-O-gas; Brom-O-gaz; Bromometano; Bromure de methyle; Bromuro di metile; Broommethaan; Celfume; Dawson 100; Detia gas ex-M; Dowfume mc-2; Dowfume mc-33; Dowfume mc-2 soil fumigant; Edco; Fumigant-1; Kayafume; MBX; MeBr; Metafume; Methogas; Methylbromid; Metylu bromek; Pestmaster; Profume; R 40B1; Rcra waste number U029; Terr-O-gas 67; Terr-O-gas 100; UN 1062; Zytox; Brom-O-sol; Methybrom
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Phase change data
Go To: Top, 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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos
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 |
---|---|---|---|---|---|
Tboil | 276.6 | K | N/A | Farchan Laboratories, 1990 | BS |
Tboil | 276.6 | K | N/A | Majer and Svoboda, 1985 | |
Tboil | 277.5 | K | N/A | McKenna, Tartar, et al., 1953 | Uncertainty assigned by TRC = 0.3 K; TRC |
Tboil | 277.65 | K | N/A | Grosse, 1937 | Uncertainty assigned by TRC = 1. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 179.47 | K | N/A | Egan and Kemp, 1938 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.02 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 23.24 | kJ/mol | N/A | Majer and Svoboda, 1985 | |
ΔvapH° | 23. | kJ/mol | C | Adams, Carson, et al., 1966 | ALS |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
23.912 | 276.71 | N/A | Egan and Kemp, 1938, 2 | P = 101.325 kPA; DH |
23.91 | 276.6 | N/A | Majer and Svoboda, 1985 | |
25.2 | 262. | N/A | Beersmans and Jungers, 2010 | Based on data from 203. to 277. K.; AC |
24.6 | 281. | A,E | Stephenson and Malanowski, 1987 | Based on data from 201. to 296. K. See also Li and Rossini, 1961.; AC |
25.8 | 238. | N/A | Kudchadker, Kudchadker, et al., 1979 | Based on data from 223. to 278. K.; AC |
23.9 ± 0.3 | 276.66 | V | Egan and Kemp, 1938, 3 | ALS |
25.3 | 263. | N/A | Egan and Kemp, 1938, 2 | Based on data from 203. to 278. K.; AC |
Entropy of vaporization
ΔvapS (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
86.42 | 276.71 | Egan and Kemp, 1938, 2 | P; 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 |
---|---|---|---|---|---|
203. to 276.8 | 4.26874 | 1069.708 | -25.771 | Beersmans and Jungers, 1947 | Coefficents calculated by NIST from author's data. |
Enthalpy of fusion
ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
5.98 | 179.5 | Domalski and Hearing, 1996 | See also Kafarov, Dorokhov, et al., 1987.; AC |
Entropy of fusion
ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
2.72 | 173.8 | Domalski and Hearing, 1996 | CAL |
33.3 | 179.5 |
Enthalpy of phase transition
ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
0.473 | 173.78 | crystaline, II | crystaline, I | Egan and Kemp, 1938, 2 | DH |
5.979 | 179.47 | crystaline, I | liquid | Egan and Kemp, 1938, 2 | DH |
Entropy of phase transition
ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
2.72 | 173.78 | crystaline, II | crystaline, I | Egan and Kemp, 1938, 2 | DH |
33.3 | 179.47 | crystaline, I | liquid | Egan and Kemp, 1938, 2 | DH |
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.
Farchan Laboratories, 1990
Farchan Laboratories,
Research Chemicals Catalog, Farchan Laboratories, Gainesville, FL, 1990, 91. [all data]
Majer and Svoboda, 1985
Majer, V.; Svoboda, V.,
Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]
McKenna, Tartar, et al., 1953
McKenna, F.E.; Tartar, H.V.; Lingafelter, E.C.,
Studies of hemiacetal formation in alcohol - aldehyde systems: II refraction studies,
J. Am. Chem. Soc., 1953, 75, 604-7. [all data]
Grosse, 1937
Grosse, A.V.,
Refractive Indices at Low Temperatures,
J. Am. Chem. Soc., 1937, 59, 2739-41. [all data]
Egan and Kemp, 1938
Egan, C.J.; Kemp, J.D.,
Methyl Bromide. The Heat Capacity, Vapor Pressure, Heats of Trans- ition, Fusion and Vaporization. Entropy and Density of the Gas,
J. Am. Chem. Soc., 1938, 60, 2097. [all data]
Adams, Carson, et al., 1966
Adams, G.P.; Carson, A.S.; Laye, P.G.,
Thermochemistry of reductions caused by lithium aluminium hydride. Part 4.-Heat of formation of methyl bromide,
Trans. Faraday Soc., 1966, 62, 1447-1449. [all data]
Egan and Kemp, 1938, 2
Egan, C.J.; Kemp, J.D.,
Methyl bromide. The heat capacity, vapor pressure, heats of transition, fusion and vaporization. Entropy and density of the gas,
J. Am. Chem. Soc., 1938, 60, 2097-2101. [all data]
Beersmans and Jungers, 2010
Beersmans, J.; Jungers, J.C.,
Synthèse et Étude des Chlorure, Bromure et Iodure de Deutérométhyle,
Bull. Soc. Chim. Belges, 2010, 56, 5-8, 238-250, https://doi.org/10.1002/bscb.19470560506
. [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]
Li and Rossini, 1961
Li, J.C.M.; Rossini, F.D.,
Vapor Pressures and Boiling Points of the l-Fluoroalkanes, l-Chloroalkanes, l-Bromoalkanes, and l-Iodoalkanes, C 1 to C 20 .,
J. Chem. Eng. Data, 1961, 6, 2, 268-270, https://doi.org/10.1021/je60010a025
. [all data]
Kudchadker, Kudchadker, et al., 1979
Kudchadker, A.P.; Kudchadker, S.A.; Shukla, R.P.; Patnaik, P.R.,
Vapor pressures and boiling points of selected halomethanes,
J. Phys. Chem. Ref. Data, 1979, 8, 2, 499, https://doi.org/10.1063/1.555600
. [all data]
Egan and Kemp, 1938, 3
Egan, C.J.; Kemp, J.D.,
Methyl bromide. The heat capacity, vapor pressure, heats of transition, fusion and vaporization. Entropy and density of the gas,
J. Am. Chem. Soc., 1938, 60, 2097-21. [all data]
Beersmans and Jungers, 1947
Beersmans, J.; Jungers, J.C.,
Synthese et Etude des Chlorure, Bromure et Iodure de Deuteromethyle,
Bull. Soc. Chim. Belg., 1947, 56, 5-8, 238-250, https://doi.org/10.1002/bscb.19470560506
. [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]
Kafarov, Dorokhov, et al., 1987
Kafarov, V.V.; Dorokhov, I.N.; Vetokhin, V.N.; Volkov, L.P.,
Dokl. Phys. Chem., 1987, 298, 77. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Tboil Boiling point Ttriple Triple point temperature ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions ΔvapS Entropy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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