Tetracosane
- Formula: C24H50
- Molecular weight: 338.6538
- IUPAC Standard InChI: InChI=1S/C24H50/c1-3-5-7-9-11-13-15-17-19-21-23-24-22-20-18-16-14-12-10-8-6-4-2/h3-24H2,1-2H3
- IUPAC Standard InChIKey: POOSGDOYLQNASK-UHFFFAOYSA-N
- CAS Registry Number: 646-31-1
- 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-Tetracosane
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Condensed phase thermochemistry 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 by: Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°solid,1 bar | 651.0 | J/mol*K | N/A | Parks, Moore, et al., 1949 | Extrapolation below 80 K, 160.5 J/mol*K. |
Constant pressure heat capacity of liquid
| Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 772.5 | 330.63 | Grigor'ev and Andolenko, 1984 | T = 331 to 433 K. Unsmoothed experimental datum given as 2.281 kJ/kg*K. |
| 805. | 353. | Atkinson, Larkin, et al., 1969 | T = 353 to 453 K. Equation only. |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 601. | 300. | Hoehne, 1981 | T = 300 to 500 K. Cv = 1.75 J/g*K. |
| 730.9 | 298.15 | Parks, Moore, et al., 1949 | T = 80 to 300 K. Specific heat at 290 to 300 K rapidly increasing; possible premelting effects. Value may be high. |
References
Go To: Top, Condensed phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Parks, Moore, et al., 1949
Parks, G.S.; Moore, G.E.; Renquist, M.L.; Naylor, B.F.; McClaine, L.A.; Fujii, P.S.; Hatton, J.A.,
Thermal data on organic compounds. XXV. Some heat capacity, entropy and free energy data for nine hydrocarbons of high molecular weight,
J. Am. Chem. Soc., 1949, 71, 3386-3389. [all data]
Grigor'ev and Andolenko, 1984
Grigor'ev, B.A.; Andolenko, R.A.,
Investigation of the isobaric heat capacity of n-paraffinic hydrocarbons at atmospheric pressure, Izv. Vyssh. Ucheb. Zaved.,
Neft i Gaz, 1984, (2), 60-62. [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]
Hoehne, 1981
Hoehne, G.W.H.,
Transitions of n-alkanes above the melting point,
Polym. Bull. (Berlin), 1981, 6, 41-46. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid Cp,solid Constant pressure heat capacity of solid S°solid,1 bar Entropy of solid at standard conditions (1 bar) - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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