n-Hexadecanoic acid
- Formula: C16H32O2
- Molecular weight: 256.4241
- IUPAC Standard InChIKey: IPCSVZSSVZVIGE-UHFFFAOYSA-N
- CAS Registry Number: 57-10-3
- 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: Hexadecanoic acid; n-Hexadecoic acid; Palmitic acid; Pentadecanecarboxylic acid; 1-Pentadecanecarboxylic acid; Cetylic acid; Emersol 140; Emersol 143; Hexadecylic acid; Hydrofol; Hystrene 8016; Hystrene 9016; Industrene 4516; Glycon P-45; Prifac 2960; NSC 5030; Palmitinic acid; Kortacid 1695; 60605-23-4; 116860-99-2; 212625-86-0; Hexadecanoic acid (palmitic acid); Hexadecanoic (palmitic) acid; Palmitic acid (hexadecanoic acid)
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Options:
Data at NIST subscription sites:
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.
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 | -848.4 ± 2.2 | kJ/mol | Ccb | Lebedeva, 1964 | Reanalyzed by Cox and Pilcher, 1970, Original value = -841.0 ± 1.9 kJ/mol; Hfusion =13.86±0.15 kcal/mol; ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -9977.2 ± 1.6 | kJ/mol | Ccb | Adriaanse, Dekker, et al., 1965 | Hfusion=53.4kJ/mol; Corresponding ΔfHºliquid = -892.2 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°liquid | -10028.6 ± 1.9 | kJ/mol | Ccb | Lebedeva, 1964 | Hfusion =13.86±0.15 kcal/mol; Corresponding ΔfHºliquid = -840.82 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°solid | -9977.6 ± 8.8 | kJ/mol | Ccb | Swain, Silbert, et al., 1964 | Corresponding ΔfHºsolid = -892.0 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°solid,1 bar | 452.37 | J/mol*K | N/A | Wirth, Droege, et al., 1956 | DH |
S°solid,1 bar | 438.65 | J/mol*K | N/A | Ward and Singleton, 1952 | Extrapolation below 90 K, 106.7 J/mol*K.; DH |
S°solid,1 bar | 475.7 | J/mol*K | N/A | Parks, Kelley, et al., 1929 | Extrapolation below 90 K, 146.4 J/mol*K. Revision of previous data.; DH |
S°solid,1 bar | 543.5 | J/mol*K | N/A | Parks and Kelley, 1925 | Extrapolation below 90 K, 214.2 J/mol*K.; DH |
Constant pressure heat capacity of solid
Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
463.36 | 298.15 | Schaake, van Miltenburg, et al., 1982 | T = 80 to 345 K.; DH |
678. | 373. | Pacor, 1967 | DH |
460.66 | 298.15 | Wirth, Droege, et al., 1956 | T = 15 to 302 K.; DH |
448. | 298. | Ward and Singleton, 1952 | T = 183 to 365 K. Three temperatures, each for solid and liquid and equations. C form.; DH |
462.3 | 292.5 | Parks and Kelley, 1925 | T = 88 to 293 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.
Lebedeva, 1964
Lebedeva, N.D.,
Heats of combustion of monocarboxylic acids,
Russ. J. Phys. Chem. (Engl. Transl.), 1964, 38, 1435-1437. [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]
Adriaanse, Dekker, et al., 1965
Adriaanse, N.; Dekker, H.; Coops, J.,
Heats of combustion of normal saturated fatty acids and their methyl esters,
Rec. Trav. Chim. Pays/Bas, 1965, 84, 393-407. [all data]
Swain, Silbert, et al., 1964
Swain, H.A., Jr.; Silbert, L.S.; Miller, J.G.,
The heats of combustion of aliphatic long chain peroxyacids, t-butyl peroxyesters, and related acids and esters,
J. Am. Chem. Soc., 1964, 86, 2562-2566. [all data]
Wirth, Droege, et al., 1956
Wirth, H.E.; Droege, J.W.; Wood, J.H.,
Low temperature heat capacity of palmitic acid and methyl palmitate,
J. Phys. Chem., 1956, 60, 917-919. [all data]
Ward and Singleton, 1952
Ward, T.L.; Singleton, W.S.,
Physical properties of fatty acids. II. Some dilatometric and thermal properties of palmitic acid,
J. Phys. Chem., 1952, 56, 696-698. [all data]
Parks, Kelley, et al., 1929
Parks, G.S.; Kelley, K.K.; Huffman, H.M.,
Thermal data on organic compounds. V. A revision of the entropies and free energies of nineteen organic compounds,
J. Am. Chem. Soc., 1929, 51, 1969-1973. [all data]
Parks and Kelley, 1925
Parks, G.S.; Kelley, K.K.,
Thermal data on organic compounds. II. The heat capacities of five organic compounds. The entropies and free energies of some homologous series of aliphatic compounds,
J. Am. Chem. Soc., 1925, 47, 2089-2097. [all data]
Schaake, van Miltenburg, et al., 1982
Schaake, R.C.F.; van Miltenburg, J.C.; De Kruif, C.G.,
Thermodynamic properties of the normal alkanoic acids. II. Molar heat capacities of seven even-numbered normal alkanoic acids,
J. Chem. Thermodynam., 1982, 14, 771-778. [all data]
Pacor, 1967
Pacor, P.,
Applicability of the DuPont 900 DTA apparatus in quantitative differential thermal analysis,
Anal. Chim. Acta, 1967, 37, 200-208. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid S°solid,1 bar Entropy of solid at standard conditions (1 bar) ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°liquid Enthalpy of formation 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.