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Octacosane

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Condensed phase thermochemistry data

Go To: Top, Phase change data, IR Spectrum, Mass spectrum (electron ionization), 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: E.S. Domalski and E.D. Hearing

Constant pressure heat capacity of liquid

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

Phase change data

Go To: Top, Condensed phase thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), 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 - 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
ALS - H.Y. Afeefy, J.F. Liebman, and S.E. Stein
CAL - J.S. Chickos, W.E. Acree, Jr., J.F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis
DH - E.S. Domalski and E.D. Hearing

Quantity Value Units Method Reference Comment
Tboil704.8KN/AWeast and Grasselli, 1989BS
Quantity Value Units Method Reference Comment
Tfus334. ± 1.KAVGN/AAverage of 23 out of 26 values; Individual data points
Quantity Value Units Method Reference Comment
Ttriple333.98KN/ADomanska and Wyrzykowska-Stankiewicz, 1991Crystal phase 1 phase; Uncertainty assigned by TRC = 0.7 K; TRC
Quantity Value Units Method Reference Comment
Deltavap141.9kJ/molCGCChickos and Hanshaw, 2004Based on data from 434. - 539. K.; AC
Deltavap150.8 ± 0.5kJ/molCGCChickos, Webb, et al., 2002AC
Deltavap150.7 ± 1.7kJ/molCGCNichols, Orf, et al., 2000AC
Deltavap152.4 ± 2.9kJ/molCGCChickos and Wilson, 1997AC
Quantity Value Units Method Reference Comment
Deltasub209. ± 10.kJ/molBPiacente, Pompili, et al., 1991AC

Reduced pressure boiling point

Tboil (K) Pressure (bar) Reference Comment
551.20.020Aldrich Chemical Company Inc., 1990BS

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
117.4 ± 1.2376.N/ARazzouk, Naccoul, et al., 2009Based on data from 339. - 412. K.; AC
118.5369.GCMokbel, Razzouk, et al., 2007Based on data from 354. - 517. K.; AC
100.5498.N/AMorgan and Kobayashi, 1994Based on data from 483. - 588. K.; AC
135. ± 3.431.TEPiacente, Fontana, et al., 1994Based on data from 407. - 456. K.; AC
105.5441.TE,ME,GSPiacente, Pompili, et al., 1991Based on data from 426. - 493. K.; AC
103.1 ± 3.0494.GSPiacente and Scardala, 1990Based on data from 473. - 515. K.; AC
99.27 ± 0.06510.VChirico, Nguyen, et al., 1989ALS
100.6500.EB,IPChirico, Nguyen, et al., 1989Based on data from 450. - 575. K.; AC
98.1560.EB,IPChirico, Nguyen, et al., 1989Based on data from 450. - 575. K.; AC
131.7315.AStephenson and Malanowski, 1987Based on data from 300. - 390. K.; AC
106.6496.A,ESTStephenson and Malanowski, 1987Based on data from 481. - 705. K. See also Kudchadker and Zwolinski, 1966.; AC

Enthalpy of sublimation

DeltasubH (kJ/mol) Temperature (K) Reference Comment
195.8 ± 2.2326.Razzouk, Naccoul, et al., 2009Based on data from 323. - 329. K.; AC

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Method Reference Comment
67.38334.2DSCHafsaoui and Mahmoud, 2007AC
63.0333.4DSCMondieig, Rajabalee, et al., 2004AC
64.64334.5N/ADomalski and Hearing, 1996AC

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
106.98331.3Domalski and Hearing, 1996CAL
193.28334.5

Enthalpy of phase transition

DeltaHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
33.675330.7crystaline, IIcrystaline, IClaudy and Letoffe, 1991DH
63.385334.7crystaline, IliquidClaudy and Letoffe, 1991DH
33.660330.40crystaline, IIcrystaline, IDomanska and Wyrzykowska-Stankiewicz, 1991, 2DH
66.520333.98crystaline, IliquidDomanska and Wyrzykowska-Stankiewicz, 1991, 2DH
35.438331.25crystaline, IIcrystaline, ICompany, 1973DH
64.642334.45crystaline, IliquidCompany, 1973DH
35.438331.15crystaline, IIcrystaline, ISchaerer, Busso, et al., 1955DH
64.643334.35crystaline, IliquidSchaerer, Busso, et al., 1955DH

Entropy of phase transition

DeltaStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
107.0331.25crystaline, IIcrystaline, ICompany, 1973DH
193.3334.45crystaline, IliquidCompany, 1973DH
107.0331.15crystaline, IIcrystaline, ISchaerer, Busso, et al., 1955DH
193.3334.35crystaline, IliquidSchaerer, Busso, et al., 1955DH

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

Data compiled by: NIST Mass Spec Data Center, S.E. Stein, director

Gas Phase Spectrum

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IR spectrum
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Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

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Owner NIST Standard Reference Data Program
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin NIST Mass Spectrometry Data Center
State gas
Instrument HP-GC/MS/IRD

This IR spectrum is from the NIST/EPA Gas-Phase Infrared Database .


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 Spec Data Center, S.E. Stein, director

Spectrum

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Mass spectrum
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Additional Data

View image of digitized spectrum (can be printed in landscape orientation).

View spectrum image in SVG format.

Download spectrum in JCAMP-DX format.

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- 729
NIST MS number 229447

All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.


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.

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]

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [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]

Nichols, Orf, et al., 2000
Nichols, Gary; Orf, Jennifer; Reiter, Sarah M.; Chickos, James; Gokel, George W., The vaporization enthalpies of some crown and polyethers by correlation gas chromatography, Thermochimica Acta, 2000, 346, 1-2, 15-28, https://doi.org/10.1016/S0040-6031(99)00405-0 . [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]

Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc., Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]

Razzouk, Naccoul, et al., 2009
Razzouk, Antonio; Naccoul, Ramy Abou; Mokbel, Ilham; Saab, Joseph; Jose, Jacques, Vapor and Sublimation Pressures of Three Normal Alkanes: C 20 , C 24 , and C 28, J. Chem. Eng. Data, 2009, 54, 4, 1214-1219, https://doi.org/10.1021/je800534x . [all data]

Mokbel, Razzouk, et al., 2007
Mokbel, Ilham; Razzouk, Antonio; Hajjaji, Ahmed; Msakni, Nizar; Jose, Jacques, A Gas Saturation Apparatus for Very Low Vapor or Sublimation Pressure Measurements (10 -3 Pa): Vapor-Liquid Equilibria of n -Alkanes ( n -C 10 , n -C 24 , n -C 28 ), J. Chem. Eng. Data, 2007, 52, 5, 1720-1725, https://doi.org/10.1021/je7001122 . [all data]

Morgan and Kobayashi, 1994
Morgan, David L.; Kobayashi, Riki, Direct vapor pressure measurements of ten n-alkanes m the 10-C28 range, Fluid Phase Equilibria, 1994, 97, 211-242, https://doi.org/10.1016/0378-3812(94)85017-8 . [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]

Chirico, Nguyen, et al., 1989
Chirico, R.D.; Nguyen, A.; Steele, W.V.; Strube, M.M., Vapor pressure of n-alkanes revisited. New high-precision vapor pressure data on n-decane, n-eicosane, and n-octacosane, J. Chem. Eng. Data, 1989, 34, 149-156. [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]

Hafsaoui and Mahmoud, 2007
Hafsaoui, S.L.; Mahmoud, R., Solid-liquid equilibria of binary systems containing n-tetracosane with naphthalene or dibenzofuran, J Therm Anal Calorim, 2007, 88, 2, 565-570, https://doi.org/10.1007/s10973-006-8084-2 . [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]

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