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Methylamine, N,N-dimethyl-

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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:
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
DRB - Donald R. Burgess, Jr.
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tboil275. ± 5.KAVGN/AAverage of 6 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus155.95KN/ARoberts, Emeleus, et al., 1939Uncertainty assigned by TRC = 0.2 K; TRC
Tfus149.4KN/ASimon and Huter, 1935Uncertainty assigned by TRC = 0.5 K; TRC
Tfus155.95KN/ASimon and Huter, 1935, 2Uncertainty assigned by TRC = 2. K; TRC
Tfus155.85KN/AWiberg and Sutterlin, 1935Uncertainty assigned by TRC = 0.5 K; TRC
Tfus149.15KN/ATimmermans and Mattaar, 1921Uncertainty assigned by TRC = 1. K; TRC
Quantity Value Units Method Reference Comment
Ttriple156.08KN/AAston, Sagenkahn, et al., 1944Uncertainty assigned by TRC = 0.05 K; based on T0 = 273.16 K; TRC
Quantity Value Units Method Reference Comment
Tc433.2KN/AMajer and Svoboda, 1985 
Tc432.79KN/AKay and Young, 1974Uncertainty assigned by TRC = 0.15 K; TRC
Tc433.3KN/ADay and Felsing, 1950Uncertainty assigned by TRC = 0.3 K; TRC
Quantity Value Units Method Reference Comment
Pc40.87barN/AKay and Young, 1974Uncertainty assigned by TRC = 0.03 bar; TRC
Pc40.7712barN/ADay and Felsing, 1950Uncertainty assigned by TRC = 0.1066 bar; TRC
Quantity Value Units Method Reference Comment
Vc30.l/molN/ADay and Felsing, 1950Uncertainty assigned by TRC = 0.07 l/mol; TRC
Quantity Value Units Method Reference Comment
Deltavap22.18kJ/molN/AMajer and Svoboda, 1985 
Deltavap22.0 ± 0.08kJ/molVIssoire and Long, 1960Heat of formation derived by Cox and Pilcher, 1970; ALS
Deltavap22.0kJ/molN/AIssoire and Long, 1960DRB

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
22.937276.03N/AAston, Sagenkahn, et al., 1944, 2P = 101.325 kPa; DH
22.94276.N/AMajer and Svoboda, 1985 
24.6261.AStephenson and Malanowski, 1987Based on data from 193. - 276. K. See also Aston, Sagenkahn, et al., 1944, 2.; AC
23.0368.N/ADay and Felsing, 1950, 2Based on data from 333. - 403. K.; AC
24.1288.N/ASwift and Hochanadel, 1945Based on data from 273. - 313. K.; AC
22.94 ± 0.03276.03VAston, Sagenkahn, et al., 1944, 3ALS
24.5250.CAston, Sagenkahn, et al., 1944, 2AC
24.35276.2VThompson and Linnett, 1936ALS

Enthalpy of vaporization

ΔvapH = A exp(-βTr) (1 − Tr)β
    ΔvapH = Enthalpy of vaporization (at saturation pressure) (kJ/mol)
    Tr = reduced temperature (T / Tc)

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Temperature (K) A (kJ/mol) beta Tc (K) Reference Comment
250. - 276.36.560.2824433.2Majer and Svoboda, 1985 

Entropy of vaporization

DeltavapS (J/mol*K) Temperature (K) Reference Comment
83.10276.03Aston, Sagenkahn, et al., 1944, 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
192.84 - 276.604.01613970.297-34.06Aston, Sagenkahn, et al., 1944, 2Coefficents calculated by NIST from author's data.

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Reference Comment
6.544156.08Aston, Sagenkahn, et al., 1944, 2DH
6.54156.1Acree, 1991AC

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
41.93156.08Aston, Sagenkahn, et al., 1944, 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.

Roberts, Emeleus, et al., 1939
Roberts, E.R.; Emeleus, H.J.; Briscoe, H.V.A., Preparation and Prop. of Ethyldideuteramine and Dimethyldeuteramine, J. Chem. Soc., 1939, 1939, 41. [all data]

Simon and Huter, 1935
Simon, A.; Huter, J., Vapor Pressure Curves, Melting Point and Chemical Constants of Dimethyl, Trimethyl- and Isobutylamines, Z. Elektrochem., 1935, 41, 28. [all data]

Simon and Huter, 1935, 2
Simon, A.; Huter, J., Z. Elektrochem., 1935, 41, 294. [all data]

Wiberg and Sutterlin, 1935
Wiberg, E.; Sutterlin, W., The Vapor Pressures and Melting Points of Dimethyl- and Trimethylamine Trimethylamines, Z. Elektrochem., 1935, 41, 151. [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]

Aston, Sagenkahn, et al., 1944
Aston, J.G.; Sagenkahn, M.L.; Szasz, G.J.; Moessen, G.W.; Zuhr, H.F., The Heat Capacity and Entropy, Heats of Fusion and Vaporization and the Vapor Pressure of Trimethylamine. The Entropy From Spectroscopic and Molecular Data, J. Am. Chem. Soc., 1944, 66, 1171. [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]

Kay and Young, 1974
Kay, W.B.; Young, C.L., Int. DATA Ser., Sel. Data Mixtures, Ser. A, 1974, No. 2, 154. [all data]

Day and Felsing, 1950
Day, H.O.; Felsing, W.A., Some Vapor Pressures and the Critical COnstants of Trimethylamine, J. Am. Chem. Soc., 1950, 72, 1698. [all data]

Issoire and Long, 1960
Issoire, J.; Long, C., Etude de la thermodynamique chimique de la reaction de formation des methylamines, Bull. Soc. Chim. France, 1960, 2004-2012. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Aston, Sagenkahn, et al., 1944, 2
Aston, J.G.; Sagenkahn, M.L.; Szasa, G.J.; Moessen, G.W.; Zuhr, H.F., The heat capacity and entropy, heats of fusion and vaporization and the vapor pressure of trimethylamine. The entropy from spectroscopic and molecular data, J. Am. Chem. Soc., 1944, 66, 1171-1177. [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]

Day and Felsing, 1950, 2
Day, H.O.; Felsing, W.A., Some Vapor Pressures and the Critical Constants of Trimethylamine, J. Am. Chem. Soc., 1950, 72, 4, 1698-1699, https://doi.org/10.1021/ja01160a077 . [all data]

Swift and Hochanadel, 1945
Swift, Elijah; Hochanadel, Helen Phillips, The Vapor Pressure of Trimethylamine from 0 to 40°, J. Am. Chem. Soc., 1945, 67, 5, 880-881, https://doi.org/10.1021/ja01221a508 . [all data]

Aston, Sagenkahn, et al., 1944, 3
Aston, J.G.; Sagenkahn, M.L.; Szasz, G.J.; Moessen, G.W.; Zuhr, H.F., The heat capacity and entropy, heats of fusion and vaporization and the vapor pressure of trimethylamine. The entropy from spectroscopic and molecular data, J. Am. Chem. Soc., 1944, 66, 1171-11. [all data]

Thompson and Linnett, 1936
Thompson, H.W.; Linnett, J.W., The vapour pressures and association of some metallic and non-metallic alkyls, Trans. Faraday Soc., 1936, 32, 681-685. [all data]

Acree, 1991
Acree, William E., Thermodynamic properties of organic compounds: enthalpy of fusion and melting point temperature compilation, Thermochimica Acta, 1991, 189, 1, 37-56, https://doi.org/10.1016/0040-6031(91)87098-H . [all data]


Notes

Go To: Top, Phase change data, References