Undecane
- Formula: C11H24
- Molecular weight: 156.3083
- IUPAC Standard InChI: InChI=1S/C11H24/c1-3-5-7-9-11-10-8-6-4-2/h3-11H2,1-2H3
- IUPAC Standard InChIKey: RSJKGSCJYJTIGS-UHFFFAOYSA-N
- CAS Registry Number: 1120-21-4
- 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-Undecane; Hendecane; n-C11H24; UN 2330
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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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -78.21 ± 0.62 | kcal/mol | Ccb | Prosen and Rossini, 1945 | Reanalyzed by Cox and Pilcher, 1970, Original value = -78.06 ± 0.30 kcal/mol; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°liquid | -1776.13 ± 0.61 | kcal/mol | Ccb | Prosen and Rossini, 1945 | Reanalyzed by Cox and Pilcher, 1970, Original value = -1776.32 ± 0.25 kcal/mol; Corresponding ΔfHºliquid = -78.21 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°liquid | -1775.0 | kcal/mol | Ccb | Jessup, 1937 | Corresponding ΔfHºliquid = -79.40 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid | 109.50 | cal/mol*K | N/A | Finke, Gross, et al., 1954 | DH |
| S°liquid | 110.9 | cal/mol*K | N/A | Huffman, Parks, et al., 1931 | Extrapolation below 90 K, 100.08 J/mol*K.; DH |
Constant pressure heat capacity of liquid
| Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 81.52 | 292.29 | Grigor'ev and Andolenko, 1984 | T = 292 to 433 K. Unsmoothed experimental datum given as 2.181 kJ/kg*K.; DH |
| 82.469 | 298.15 | Finke, Gross, et al., 1954 | T = 12 to 320 K.; DH |
| 81.91 | 298.0 | Huffman, Parks, et al., 1931 | T = 92 to 298 K. Value is unsmoothed experimental datum.; DH |
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.
Prosen and Rossini, 1945
Prosen, E.J.; Rossini, F.D.,
Heats of combustion and formation of the paraffin hydrocarbons at 25° C,
J. Res. NBS, 1945, 263-267. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Jessup, 1937
Jessup, R.S.,
Heats of combustion of the liquid normal paraffin hydrocarbons from hexane to dodecane,
J. Res. NBS, 1937, 18, 114-128. [all data]
Finke, Gross, et al., 1954
Finke, H.L.; Gross, M.E.; Waddington, G.; Huffman, H.M.,
Low-temperature thermal data for the nine normal paraffin hydrocarbons from octane to hexadecane,
J. Am. Chem. Soc., 1954, 76, 333-341. [all data]
Huffman, Parks, et al., 1931
Huffman, H.M.; Parks, G.S.; Barmore, M.,
Thermal data on organic compounds. X. Further studies on the heat capacities, entropies and free energies of hydrocarbons,
J. Am. Chem. Soc., 1931, 53, 3876-3888. [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]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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