Pentatriacontane
- Formula: C35H72
- Molecular weight: 492.9462
- IUPAC Standard InChI: InChI=1S/C35H72/c1-3-5-7-9-11-13-15-17-19-21-23-25-27-29-31-33-35-34-32-30-28-26-24-22-20-18-16-14-12-10-8-6-4-2/h3-35H2,1-2H3
- IUPAC Standard InChIKey: VHQQPFLOGSTQPC-UHFFFAOYSA-N
- CAS Registry Number: 630-07-9
- 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-Pentatriacontane; n-Pentatriacotane
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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 - 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 | 763.2 | K | N/A | Weast and Grasselli, 1989 | BS |
| Quantity | Value | Units | Method | Reference | Comment |
| Tfus | 348. ± 2. | K | AVG | N/A | Average of 17 values; Individual data points |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔvapH° | 42.5 | kcal/mol | CGC | Chickos and Hanshaw, 2004 | Based on data from 534. to 565. K.; AC |
Reduced pressure boiling point
| Tboil (K) | Pressure (atm) | Reference | Comment |
|---|---|---|---|
| 584.2 | 0.013 | Weast and Grasselli, 1989 | BS |
Enthalpy of vaporization
| ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 29.25 | 544. | A,E | Stephenson and Malanowski, 1987 | Based on data from 529. to 764. K. See also Kudchadker and Zwolinski, 1966.; AC |
Enthalpy of fusion
| ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 20.7 | 347.2 | Domalski and Hearing, 1996 | AC |
Entropy of fusion
| ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 28.49 | 344.7 | Domalski and Hearing, 1996 | CAL |
| 59.477 | 347.2 |
Enthalpy of phase transition
| ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 9.8200 | 344.7 | crystaline, II | crystaline, I | Garner, Van Bibber, et al., 1931 | DH |
| 20.650 | 347.2 | 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 |
|---|---|---|---|---|---|
| 28.49 | 344.7 | crystaline, II, á | crystaline, I, à transition | Garner, Van Bibber, et al., 1931 | DH |
| 59.46 | 347.2 | 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 31 to C 38 at T = 298.15 K by Correlation Gas Chromatography,
J. Chem. Eng. Data, 2004, 49, 3, 620-630, https://doi.org/10.1021/je030236t
. [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]
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 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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