Triacontane
- Formula: C30H62
- Molecular weight: 422.8133
- IUPAC Standard InChIKey: JXTPJDDICSTXJX-UHFFFAOYSA-N
- CAS Registry Number: 638-68-6
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: n-Triacontane
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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
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 |
---|---|---|---|---|---|
Tboil | 722.9 | K | N/A | Weast and Grasselli, 1989 | BS |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 338.9 ± 0.5 | K | AVG | N/A | Average of 19 out of 22 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 36.40 | kcal/mol | CGC | Chickos and Hanshaw, 2004 | Based on data from 434. to 539. K.; AC |
ΔvapH° | 39.32 ± 0.1 | kcal/mol | CGC | Nichols, Orf, et al., 2000 | AC |
Reduced pressure boiling point
Tboil (K) | Pressure (atm) | Reference | Comment |
---|---|---|---|
531.7 | 0.004 | Aldrich Chemical Company Inc., 1990 | BS |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
34.2 ± 0.5 | 454. | TE | Piacente, Fontana, et al., 1994 | Based on data from 422. to 487. K.; AC |
26.60 | 510. | A,E | Stephenson and Malanowski, 1987 | Based on data from 495. to 723. K. See also Kudchadker and Zwolinski, 1966.; AC |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
16.45 | 338.7 | Domalski and Hearing, 1996 | AC |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
26.726 | 335.3 | Domalski and Hearing, 1996 | CAL |
48.576 | 338.7 |
Temperature of phase transition
Ttrs (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|
335.15 | crystaline, II | crystaline, I | Schaerer, Busso, et al., 1955 | DH |
338.55 | crystaline, I | liquid | Schaerer, Busso, et al., 1955 | DH |
Enthalpy of phase transition
ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
8.9601 | 335.25 | crystaline, II | crystaline, I | Company, 1973 | DH |
16.450 | 338.65 | crystaline, I | liquid | Company, 1973 | DH |
8.7199 | 332.2 | crystaline, II | crystaline, I | Garner, Van Bibber, et al., 1931 | DH |
16.450 | 338.7 | crystaline, I | liquid | Garner, Van Bibber, et al., 1931 | DH |
Entropy of phase transition
ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
26.72 | 335.25 | crystaline, II | crystaline, I | Company, 1973 | DH |
48.57 | 338.65 | crystaline, I | liquid | Company, 1973 | DH |
26.24 | 332.2 | crystaline, II, á | crystaline, I, à transition | Garner, Van Bibber, et al., 1931 | DH |
48.57 | 338.7 | crystaline, I | liquid | Garner, Van Bibber, et al., 1931 | DH |
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.
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]
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]
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]
Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc.,
Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [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]
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]
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]
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]
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]
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]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Tboil Boiling point Tfus Fusion (melting) point Ttrs Temperature of phase transition ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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