Heptane
- Formula: C7H16
- Molecular weight: 100.2019
- IUPAC Standard InChI: InChI=1S/C7H16/c1-3-5-7-6-4-2/h3-7H2,1-2H3
- IUPAC Standard InChIKey: IMNFDUFMRHMDMM-UHFFFAOYSA-N
- CAS Registry Number: 142-82-5
- 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. - Isotopologues:
- Other names: n-Heptane; Dipropylmethane; Heptyl hydride; Skellysolve C; n-C7H16; Eptani; Heptan; Heptanen; Gettysolve-C; NSC 62784
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Data at other public NIST sites:
- Options:
Data at NIST subscription sites:
- NIST / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data)
- NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)
NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.
Enthalpy of combustion of liquid at standard conditions (nominally 298.15 K, 1 atm.)
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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| ΔcH°liquid (kJ/mol) | Method | Reference | Comment |
|---|---|---|---|
| -4830. ± 120. | Ccb | Delafontaine, Sabbah, et al., 1973 | Δ U value; Corresponding ΔfHºliquid = -216. kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| -4818.7 | Ccb | Skuratov, Kozina, et al., 1957 | Corresponding ΔfHºliquid = -223. kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| -4816.91 ± 0.63 | Ccb | Prosen and Rossini, 1945 | Corresponding ΔfHºliquid = -224.3 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| -4817.16 ± 0.88 | Ccb | Prosen and Rossini, 1944 | Corresponding ΔfHºliquid = -224.1 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| -4815. ± 1. | Ccb | Davies and Gilbert, 1941 | Corresponding ΔfHºliquid = -226.5 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| -4810.3 | Ccb | Jones and Starr, 1941 | Corresponding ΔfHºliquid = -231. kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| -4817.0 ± 1.5 | Ccb | Jessup, 1937 | Reanalyzed by Cox and Pilcher, 1970, Original value = -4814.0 kJ/mol; Corresponding ΔfHºliquid = -224.2 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
References
Go To: Top, Enthalpy of combustion of liquid at standard conditions (nominally 298.15 K, 1 atm.), Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Delafontaine, Sabbah, et al., 1973
Delafontaine, J.; Sabbah, R.; Laffitte, M.,
Mesures microcalorimetriques des enthalpies de reference de formation (a l'etat condense) de composes volatils - mise au point de la technique,
Z. Phys. Chem. (Neue Folge), 1973, 84, 157-172. [all data]
Skuratov, Kozina, et al., 1957
Skuratov, S.M.; Kozina, M.L.; Shteher, S.M.; Varushyenko, R.M.,
The heats of combustion of several purified compounds,
Thermochem. Bull. (Moscow State Univ.), March, 1957, 36-37. [all data]
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]
Prosen and Rossini, 1944
Prosen, E.J.; Rossini, F.D.,
Heats of combustion of eight normal paraffin hydrocarbons in the liquid state,
J. Res. NBS, 1944, 33, 255-272. [all data]
Davies and Gilbert, 1941
Davies, G.F.; Gilbert, E.C.,
Heats of combustion and formation of the nine isomeric heptanes in the liquid state,
J. Am. Chem. Soc., 1941, 63, 2730-2732. [all data]
Jones and Starr, 1941
Jones, W.H.; Starr, C.E., Jr.,
Determination of the heat of combustion of gasolines,
Ind. Eng. Chem., 1941, 13, 287-290. [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]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Notes
Go To: Top, Enthalpy of combustion of liquid at standard conditions (nominally 298.15 K, 1 atm.), References
- Symbols used in this document:
ΔcH°liquid Enthalpy of combustion of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.