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Hexacosane

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Condensed phase thermochemistry 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 by: Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
solid,1 bar159.4cal/mol*KN/AAndon and Martin, 1976crystaline, II phase

Constant pressure heat capacity of liquid

Cp,liquid (cal/mol*K) Temperature (K) Reference Comment
208.353.Atkinson, Larkin, et al., 1969T = 353 to 453 K. Equation only.

Constant pressure heat capacity of solid

Cp,solid (cal/mol*K) Temperature (K) Reference Comment
158.0298.15Andon and Martin, 1976crystaline, II phase; T = 10 to 360 K.
162.0304.Garner, Van Bibber, et al., 1931crystaline, II phase; T = 295 to 358 K. Mean value 22-40°C, «beta»-form.

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, Chris Muzny, director
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
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil534.KN/AKrafft, 1883Uncertainty assigned by TRC = 5. K; TRC
Quantity Value Units Method Reference Comment
Tfus330. ± 1.KAVGN/AAverage of 30 out of 33 values; Individual data points
Quantity Value Units Method Reference Comment
Ttriple329.18KN/ADomanska and Wyrzykowska-Stankiewicz, 1991Crystal phase 1 phase; Uncertainty assigned by TRC = 1. K; TRC
Ttriple329.26KN/AAndon and Martin, 1976Crystal phase 1 phase; Uncertainty assigned by TRC = 0.02 K; TRC
Quantity Value Units Method Reference Comment
Deltavap31.48kcal/molCGCChickos and Hanshaw, 2004Based on data from 434. - 539. K.; AC
Deltavap33.3 ± 0.1kcal/molCGCChickos, Webb, et al., 2002AC
Deltavap32.60 ± 0.05kcal/molGSPuri, Chickos, et al., 2001AC
Deltavap33.46 ± 0.53kcal/molCGCChickos and Wilson, 1997AC
Quantity Value Units Method Reference Comment
Deltasub42.4 ± 2.4kcal/molBPiacente, Pompili, et al., 1991AC

Enthalpy of vaporization

DeltavapH (kcal/mol) Temperature (K) Method Reference Comment
31.5 ± 0.2414.TEPiacente, Fontana, et al., 1994Based on data from 391. - 437. K.; AC
23.3419.TE,ME,GSPiacente, Pompili, et al., 1991Based on data from 404. - 546. K.; AC
23.7 ± 0.91487.GSPiacente and Scardala, 1990Based on data from 455. - 519. K.; AC
24.28481.A,ESTStephenson and Malanowski, 1987Based on data from 466. - 685. K. See also Kudchadker and Zwolinski, 1966.; AC
22.6493.AStephenson and Malanowski, 1987Based on data from 478. - 530. K.; AC

Antoine Equation Parameters

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

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Temperature (K) A B C Reference Comment
477. - 672.96.570604224.36-30.387Stull, 1947Coefficents calculated by NIST from author's data.

Enthalpy of fusion

DeltafusH (kcal/mol) Temperature (K) Method Reference Comment
14.6330.9DSCGnatyuk, Platonova, et al., 2007AC
14.4329.1DSCMondieig, Rajabalee, et al., 2004AC
14.2329.5N/ADomalski and Hearing, 1996AC
13.8328.2DSCLourdin, Roux, et al., 1992AC

Entropy of fusion

DeltafusS (cal/mol*K) Temperature (K) Reference Comment
23.6326.5Domalski and Hearing, 1996CAL
43.16329.5

Enthalpy of phase transition

DeltaHtrs (kcal/mol) Temperature (K) Initial Phase Final Phase Reference Comment
8.0067325.6crystaline, IIcrystaline, IBarbillon, Schuffenecker, et al., 1991DH
14.340329.2crystaline, IliquidBarbillon, Schuffenecker, et al., 1991DH
7.8442325.8crystaline, IIcrystaline, IClaudy and Letoffe, 1991DH
14.290329.6crystaline, IliquidClaudy and Letoffe, 1991DH
7.2562324.40crystaline, IIcrystaline, IDomanska and Wyrzykowska-Stankiewicz, 1991, 2DH
15.277329.18crystaline, IliquidDomanska and Wyrzykowska-Stankiewicz, 1991, 2DH
7.9876325.5crystaline, IIcrystaline, IAndon and Martin, 1976DH
14.508329.25crystaline, IliquidAndon and Martin, 1976DH
8.1800326.55crystaline, IIcrystaline, ICompany, 1973DH
14.220329.55crystaline, IliquidCompany, 1973DH
7.7000326.45crystaline, IIcrystaline, ISchaerer, Busso, et al., 1955DH
14.220329.45crystaline, IliquidSchaerer, Busso, et al., 1955DH
8.3700323.3crystaline, IIcrystaline, IGarner, Van Bibber, et al., 1931DH
14.040329.3crystaline, IliquidGarner, Van Bibber, et al., 1931DH

Entropy of phase transition

DeltaStrs (cal/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
24.55325.5crystaline, IIcrystaline, IAndon and Martin, 1976DH
44.07329.25crystaline, IliquidAndon and Martin, 1976DH
25.05326.55crystaline, IIcrystaline, ICompany, 1973DH
43.14329.55crystaline, IliquidCompany, 1973DH
23.6326.45crystaline, IIcrystaline, ISchaerer, Busso, et al., 1955DH
43.16329.45crystaline, IliquidSchaerer, Busso, et al., 1955DH
25.88323.3crystaline, II, ácrystaline, I, à transitionGarner, Van Bibber, et al., 1931DH
42.64329.3crystaline, IliquidGarner, Van Bibber, et al., 1931DH

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:


IR Spectrum

Go To: Top, Condensed phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), References, Notes

Data compiled by: Coblentz Society, Inc.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director


Mass spectrum (electron ionization)

Go To: Top, Condensed phase thermochemistry data, Phase change data, IR Spectrum, References, Notes

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

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

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Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin Japan AIST/NIMC Database- Spectrum MS-NW-6930
NIST MS number 231554

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References

Go To: Top, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Notes

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

Andon and Martin, 1976
Andon, R.J.L.; Martin, J.F., Thermodynamic properties of hexacosane, J. Chem. Thermodynam., 1976, 8, 1159-1166. [all data]

Atkinson, Larkin, et al., 1969
Atkinson, C.M.L.; Larkin, J.A.; Richardson, M.J., Enthalpy changes in molten n-alkanes and polyethylene, J. Chem. Thermodynam., 1969, 1, 435-445. [all data]

Garner, Van Bibber, et al., 1931
Garner, W.E.; Van Bibber, K.; King, A.M., The melting points and heats of crystallization of the normal long-chain hydrocarbons, J. Chem. Soc. (London), 1931, 1931, 1533-1541. [all data]

Krafft, 1883
Krafft, F., Chem.-Ztg., 1883, 7, 153. [all data]

Domanska and Wyrzykowska-Stankiewicz, 1991
Domanska, U.; Wyrzykowska-Stankiewicz, D., Enthalpies of fusion and solid-solid transition of even-numbered paraffins docosane, hexacosane, octacosane and tetracosane, Thermochim. Acta, 1991, 179, 265-71. [all data]

Chickos and Hanshaw, 2004
Chickos, James S.; Hanshaw, William, Vapor Pressures and Vaporization Enthalpies of the n -Alkanes from C 21 to C 30 at T = 298.15 K by Correlation Gas Chromatography, J. Chem. Eng. Data, 2004, 49, 1, 77-85, https://doi.org/10.1021/je0301747 . [all data]

Chickos, Webb, et al., 2002
Chickos, James S.; Webb, Paul; Nichols, Gary; Kiyobayashi, Tetsu; Cheng, Pei-Chao; Scott, Lawrence, The enthalpy of vaporization and sublimation of corannulene, coronene, and perylene at T= 298.15 K, The Journal of Chemical Thermodynamics, 2002, 34, 8, 1195-1206, https://doi.org/10.1006/jcht.2002.0977 . [all data]

Puri, Chickos, et al., 2001
Puri, Swati; Chickos, James S.; Welsh, William J., Determination of Vaporization Enthalpies of Polychlorinated Biphenyls by Correlation Gas Chromatography, Anal. Chem., 2001, 73, 7, 1480-1484, https://doi.org/10.1021/ac001246p . [all data]

Chickos and Wilson, 1997
Chickos, James S.; Wilson, Joe A., Vaporization Enthalpies at 298.15 K of the n -Alkanes from C 21 to C 28 and C 30, J. Chem. Eng. Data, 1997, 42, 1, 190-197, https://doi.org/10.1021/je960089h . [all data]

Piacente, Pompili, et al., 1991
Piacente, Vincenzo; Pompili, Tiziano; Scardala, Paolo; Ferro, Daniela, Temperature dependence of the vaporization enthalpies of n-alkanes from vapour-pressure measurements, The Journal of Chemical Thermodynamics, 1991, 23, 4, 379-396, https://doi.org/10.1016/S0021-9614(05)80092-8 . [all data]

Piacente, Fontana, et al., 1994
Piacente, Vincenzo; Fontana, Danilo; Scardala, Paolo, Enthalpies of Vaporization of a Homologous Series of n-Alkanes Determined from Vapor Pressure Measurements, J. Chem. Eng. Data, 1994, 39, 2, 231-237, https://doi.org/10.1021/je00014a009 . [all data]

Piacente and Scardala, 1990
Piacente, Vincenzo; Scardala, Paolo, Vaporization enthalpies and entropies of some n-alkanes, Thermochimica Acta, 1990, 159, 193-200, https://doi.org/10.1016/0040-6031(90)80108-B . [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]

Kudchadker and Zwolinski, 1966
Kudchadker, A.P.; Zwolinski, B.J., Vapor Pressure and Boiling Points of Normal Alkanes, C 21 to C 100 ., J. Chem. Eng. Data, 1966, 11, 2, 253-255, https://doi.org/10.1021/je60029a039 . [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]

Gnatyuk, Platonova, et al., 2007
Gnatyuk, I.I.; Platonova, N.V.; Puchkovskaya, G.A.; Kotelnikova, E.N.; Filatov, S.K.; Baran, J.; Drozd, M., Polymorphic transformations of C26H54 and C28H58 n-paraffins as typical rotator substances, J Struct Chem, 2007, 48, 4, 654-665, https://doi.org/10.1007/s10947-007-0099-4 . [all data]

Mondieig, Rajabalee, et al., 2004
Mondieig, D.; Rajabalee, F.; Metivaud, V.; Oonk, H.A.J.; Cuevas-Diarte, M.A., n -Alkane Binary Molecular Alloys, Chem. Mater., 2004, 16, 5, 786-798, https://doi.org/10.1021/cm031169p . [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]

Lourdin, Roux, et al., 1992
Lourdin, D.; Roux, A.H.; Grolier, J.-P.E.; Buisine, J.-M., Thermobarometric and differential scanning calorimetric study of the polymorphism of some even and odd paraffins (C26, C27, C40, C60), Thermochimica Acta, 1992, 204, 1, 99-110, https://doi.org/10.1016/0040-6031(92)80319-R . [all data]

Barbillon, Schuffenecker, et al., 1991
Barbillon, P.; Schuffenecker, L.; Dellacherie, J.; Balesdent, D.; Dirande, M., Variation d'enthalpie subie de 260 K a 340 K par les n-paraffines, comprises entrel'octadecane et l'hexacosane, J. Chim. Phys. Phys.-Chim. Biol., 1991, 88, 91-113. [all data]

Claudy and Letoffe, 1991
Claudy, P.; Letoffe, J.M., Phase transitions in even n-alkanes CnH2n+2, n = 16-28. Characterization by differential calorimetric analysis and by thermooptical analysis. Effect of deuteration, Calorim. Anal. Therm., 1991, 22, 281-290. [all data]

Domanska and Wyrzykowska-Stankiewicz, 1991, 2
Domanska, U.; Wyrzykowska-Stankiewicz, D., Enthalpies of fusion and solid-solid transition of even-numbered paraffins docosane, hexacosane, octacosane and tetracosane, Thermochim. Acta, 1991, 179, 265-271. [all data]

Company, 1973
Company, J.C., Measurement and interpretation of crystallization equilibriums of heavy paraffin and aromatic hydrocarbon solutions, Chem. Eng. Sci., 1973, 28, 318-323. [all data]

Schaerer, Busso, et al., 1955
Schaerer, A.A.; Busso, C.J.; Smith, A.E.; Skinner, L.B., Properties of pure normal alkanes in the C17 to C36 range, J. Am. Chem. Soc., 1955, 77, 2017-2019. [all data]


Notes

Go To: Top, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), References