Hexane, 2-methyl-

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.


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
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil363.2 ± 0.5KAVGN/AAverage of 44 out of 48 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus154.7 ± 0.6KAVGN/AAverage of 22 out of 23 values; Individual data points
Quantity Value Units Method Reference Comment
Ttriple154.6 ± 0.8KAVGN/AAverage of 6 values; Individual data points
Quantity Value Units Method Reference Comment
Tc530.5 ± 0.5KAVGN/AAverage of 6 values; Individual data points
Quantity Value Units Method Reference Comment
Pc27.0 ± 0.2atmN/ADaubert, 1996 
Pc27.14atmN/AAbara, Jennings, et al., 1988Uncertainty assigned by TRC = 0.25 atm; TRC
Pc26.971atmN/AMcMicking and Kay, 1965Uncertainty assigned by TRC = 0.4000 atm; TRC
Pc27.2000atmN/AEdgar and Calingaert, 1929Uncertainty assigned by TRC = 0.5000 atm; measured by Keys and Kleinschmidt; TRC
Quantity Value Units Method Reference Comment
Vc0.421l/molN/ADaubert, 1996 
Quantity Value Units Method Reference Comment
ρc2.38 ± 0.02mol/lN/ADaubert, 1996 
ρc2.38mol/lN/AMcMicking and Kay, 1965Uncertainty assigned by TRC = 0.05 mol/l; ~; TRC
Quantity Value Units Method Reference Comment
Δvap8.360kcal/molN/AMajer and Svoboda, 1985 
Δvap8.34 ± 0.02kcal/molCMajer, Svoboda, et al., 1979AC
Δvap8.32kcal/molN/AReid, 1972AC
Δvap8.32kcal/molN/AHuffman, Gross, et al., 1961Based on data from 273. - 318. K.; AC

Enthalpy of vaporization

ΔvapH (kcal/mol) Temperature (K) Method Reference Comment
7.318363.2N/AMajer and Svoboda, 1985 
8.27311.AStephenson and Malanowski, 1987Based on data from 296. - 365. K.; AC
8.10 ± 0.02313.CMajer, Svoboda, et al., 1979AC
7.82 ± 0.02333.CMajer, Svoboda, et al., 1979AC
7.48 ± 0.02353.CMajer, Svoboda, et al., 1979AC
8.32306.N/AForziati, Norris, et al., 1949Based on data from 291. - 364. K.; AC

Enthalpy of vaporization

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

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Temperature (K) A (kcal/mol) β Tc (K) Reference Comment
298. - 353.12.0.2879530.3Majer and Svoboda, 1985 

Antoine Equation Parameters

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

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Temperature (K) A B C Reference Comment
291.68 - 364.094.000821240.869-53.047Forziati, Norris, et al., 1949, 2Coefficents calculated by NIST from author's data.

Enthalpy of fusion

ΔfusH (kcal/mol) Temperature (K) Reference Comment
2.195154.90Huffman, Gross, et al., 1961DH
2.19154.9Domalski and Hearing, 1996AC
2.120154.0Huffman, Parks, et al., 1930DH
2.120154.0Parks, Huffman, et al., 1930DH

Entropy of fusion

ΔfusS (cal/mol*K) Temperature (K) Reference Comment
14.17154.90Huffman, Gross, et al., 1961DH
13.77154.0Huffman, Parks, et al., 1930DH
13.77154.0Parks, Huffman, et al., 1930DH

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.

Daubert, 1996
Daubert, T.E., Vapor-Liquid Critical Properties of Elements and Compounds. 5. Branched Alkanes and Cycloalkanes, J. Chem. Eng. Data, 1996, 41, 365-372. [all data]

Abara, Jennings, et al., 1988
Abara, J.A.; Jennings, D.W.; Kay, W.B.; Teja, A.S., Phase Behavior in the Critical Region of Six Binary Mixtures of 2-Methylalkanes, J. Chem. Eng. Data, 1988, 33, 242. [all data]

McMicking and Kay, 1965
McMicking, J.H.; Kay, W.B., Vapor Pressures and Saturated Liquid and Vapor Densities of The Isomeric Heptanes and Isomeric Octanes, Proc., Am. Pet. Inst., Sect. 3, 1965, 45, 75-90. [all data]

Edgar and Calingaert, 1929
Edgar, G.; Calingaert, G., Preparation and Properties of the Isomeric Heptanes II. Physical Prop. properties, J. Am. Chem. Soc., 1929, 51, 1540. [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]

Majer, Svoboda, et al., 1979
Majer, Vladimír; Svoboda, Václav; Hála, Slavoj; Pick, Jirí, Temperature dependence of heats of vaporization of saturated hydrocarbons C5-C8; Experimental data and an estimation method, Collect. Czech. Chem. Commun., 1979, 44, 3, 637-651, https://doi.org/10.1135/cccc19790637 . [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]

Huffman, Gross, et al., 1961
Huffman, H.M.; Gross, M.E.; Scott, D.W.; McCullough, I.P., Low temperature thermodynamic properties of six isomeric heptanes, J. Phys. Chem., 1961, 65, 495-503. [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]

Forziati, Norris, et al., 1949
Forziati, Alphonse F.; Norris, William R.; Rossini, Frederick D., Vapor pressures and boiling points of sixty API-NBS hydrocarbons, J. RES. NATL. BUR. STAN., 1949, 43, 6, 555-17, https://doi.org/10.6028/jres.043.050 . [all data]

Forziati, Norris, et al., 1949, 2
Forziati, A.F.; Norris, W.R.; Rossini, F.D., Vapor Pressures and Boiling Points of Sixty API-NBS Hydrocarbons, J. Res. Natl. Bur. Stand. (U.S.), 1949, 43, 6, 555-563, https://doi.org/10.6028/jres.043.050 . [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]

Huffman, Parks, et al., 1930
Huffman, H.M.; Parks, G.S.; Thomas, S.B., Thermal data on organic compounds. VIII. The heat capacities, entropies and free energies of the isomeric heptanes, J. Am. Chem. Soc., 1930, 52, 3241-3251. [all data]

Parks, Huffman, et al., 1930
Parks, G.S.; Huffman, H.M.; Thomas, S.B., Thermal data on organic compounds. VI. The heat capacities, entropies and free energies of some saturated, non-benzenoid hydrocarbons, J. Am. Chem. Soc., 1930, 52, 1032-1041. [all data]


Notes

Go To: Top, Phase change data, References