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2-Butene, 2-methyl-

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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 - R.L. Brown and S.E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, M. Frenkel director
AC - W.E. Acree, Jr., J.S. Chickos
DH - E.S. Domalski and E.D. Hearing

QuantityValueUnitsMethodReferenceComment
Tboil311. ± 1.KAVGN/AAverage of 44 out of 45 values; Individual data points
QuantityValueUnitsMethodReferenceComment
Tfus140. ± 10.KAVGN/AAverage of 10 values; Individual data points
QuantityValueUnitsMethodReferenceComment
Ttriple139.40KN/AChao, Hall, et al., 1983Uncertainty assigned by TRC = 0.02 K; TRC
Ttriple139.42KN/ATodd, Oliver, et al., 1947Uncertainty assigned by TRC = 0.05 K; TRC
Ttriple139.440KN/AHuffman, 1945Uncertainty assigned by TRC = 0.6 K; TRC
Ttriple139.420KN/AHuffman, 1945Uncertainty assigned by TRC = 0.6 K; TRC
Ttriple138.9KN/AParks and Huffman, 1930Uncertainty assigned by TRC = 0.2 K; TRC
QuantityValueUnitsMethodReferenceComment
Tc470. ± 1.KN/ATsonopoulos and Ambrose, 1996 
Tc481.KN/AMajer and Svoboda, 1985 
QuantityValueUnitsMethodReferenceComment
Pc34.2 ± 1.0barN/ATsonopoulos and Ambrose, 1996 
QuantityValueUnitsMethodReferenceComment
Deltavap27.34kJ/molN/AMajer and Svoboda, 1985 
Deltavap27.1kJ/molN/AReid, 1972AC
Deltavap27.1 ± 0.1kJ/molCScott, Waddington, et al., 1949AC

Enthalpy of vaporization

DeltavapH (kJ/mol)Temperature (K)MethodReferenceComment
26.31311.7N/AMajer and Svoboda, 1985 
28.4286.AStephenson and Malanowski, 1987Based on data from 271. - 343. K.; AC
28.3291.N/AScott, Waddington, et al., 1949Based on data from 276. - 344. K.; AC
27.5 ± 0.1290.CScott, Waddington, et al., 1949AC
26.3 ± 0.1312.CScott, Waddington, et al., 1949AC

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)betaTc (K)ReferenceComment
290. - 312.41.460.2688481.Majer and Svoboda, 1985 

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Temperature (K)ABCReferenceComment
276.19 - 343.744.047271098.619-39.889Scott, Waddington, et al., 1949Coefficents calculated by NIST from author's data.

Enthalpy of fusion

DeltafusH (kJ/mol)Temperature (K)ReferenceComment
7.579139.40Chao, Hall, et al., 1983, 2DH
7.5973139.42Todd, Oliver, et al., 1947, 2DH
7.59139.4Domalski and Hearing, 1996AC
7.435138.9Parks and Huffman, 1930, 2DH

Entropy of fusion

DeltafusS (J/mol*K)Temperature (K)ReferenceComment
54.37139.40Chao, Hall, et al., 1983, 2DH
54.49139.42Todd, Oliver, et al., 1947, 2DH
5.35138.9Parks and Huffman, 1930, 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.

Chao, Hall, et al., 1983
Chao, J.; Hall, K.R.; Yao, J.M., Thermodynamic Properties of Simple Alkenes, Thermochim. Acta, 1983, 64, 285. [all data]

Todd, Oliver, et al., 1947
Todd, S.S.; Oliver, G.D.; Huffman, H.M., The heat capacities, heats of fusion and entropies of the six pentenes., J. Am. Chem. Soc., 1947, 69, 1519. [all data]

Huffman, 1945
Huffman, H.M., Personal Commun., U. S. Bur. Mines, Bartlesville, OK, July 25, 1945. [all data]

Parks and Huffman, 1930
Parks, G.S.; Huffman, H.M., Thermal data on organic compounds. IX. A study of the effect of unsaturation on the heat capacities, entropies and free energies of some hydrocarbons and other compounds, J. Am. Chem. Soc., 1930, 52, 4381. [all data]

Tsonopoulos and Ambrose, 1996
Tsonopoulos, C.; Ambrose, D., Vapor-Liquid Critical Properties of Elements and Compounds. 6. Unsaturated Aliphatic Hydrocarbons, J. Chem. Eng. Data, 1996, 41, 645-656. [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]

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. [doi:10.1002/aic.690180637] [all data]

Scott, Waddington, et al., 1949
Scott, D.W.; Waddington, G.; Smith, J.C.; Huffman, H.M., Thermodynamic properties of three isomeric pentenes, J. Am. Chem. Soc., 1949, 71, 2767-2773. [all data]

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

Chao, Hall, et al., 1983, 2
Chao, J.; Hall, K.R.; Yao, J.M., Thermodynamic properties of simple alkenes, Thermochim. Acta, 1983, 64(3), 285-303. [all data]

Todd, Oliver, et al., 1947, 2
Todd, S.S.; Oliver, G.D.; Huffman, H.M., The heat capacities, heats of fusion and entropies of the six pentenes, J. Am. Chem. Soc., 1947, 69, 1519-1525. [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. [doi:10.1063/1.555985] [all data]

Parks and Huffman, 1930, 2
Parks, G.S.; Huffman, H.M., Thermal data on organic compounds. IX. A study of the effect of unsaturation on the heat capacities, entropies and free energies of some hydrocarbons and other compounds, J. Am. Chem. Soc., 1930, 52, 4381-4391. [all data]


Notes

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