Tetracosane
- Formula: C24H50
- Molecular weight: 338.6538
- 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, Phase change data, 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 | 155.6 | cal/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 (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
184.6 | 330.63 | Grigor'ev and Andolenko, 1984 | T = 331 to 433 K. Unsmoothed experimental datum given as 2.281 kJ/kg*K. |
192. | 353. | Atkinson, Larkin, et al., 1969 | T = 353 to 453 K. Equation only. |
Constant pressure heat capacity of solid
Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
144. | 300. | Hoehne, 1981 | T = 300 to 500 K. Cv = 1.75 J/g*K. |
174.7 | 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. |
Phase change data
Go To: Top, Condensed phase thermochemistry data, 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:
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
DH - Eugene S. Domalski and Elizabeth D. Hearing
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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 664.5 | K | N/A | Weast and Grasselli, 1989 | BS |
Tboil | 597.3 | K | N/A | Tsakalotos, 1906 | Uncertainty assigned by TRC = 4. K; TRC |
Tboil | 516. | K | N/A | Krafft, 1883 | Uncertainty assigned by TRC = 6. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 324. ± 3. | K | AVG | N/A | Average of 35 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 323.65 | K | N/A | Domanska and Wyrzykowska-Stankiewicz, 1991 | Crystal phase 1 phase; Uncertainty assigned by TRC = 1. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 800. ± 8. | K | N/A | Ambrose and Tsonopoulos, 1995 | |
Tc | 799.8 | K | N/A | Nikitin, Pavlov, et al., 1994 | Uncertainty assigned by TRC = 3. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 9. ± 2. | atm | N/A | Ambrose and Tsonopoulos, 1995 | |
Pc | 8.55 | atm | N/A | Nikitin, Pavlov, et al., 1994 | Uncertainty assigned by TRC = 0.39 atm; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 29.13 | kcal/mol | CGC | Chickos and Hanshaw, 2004 | Based on data from 434. to 539. K.; AC |
ΔvapH° | 30.31 ± 0.1 | kcal/mol | CGC | Chickos, Webb, et al., 2002 | AC |
ΔvapH° | 30.04 ± 0.38 | kcal/mol | CGC | Nichols, Orf, et al., 2000 | AC |
ΔvapH° | 30.16 ± 0.55 | kcal/mol | CGC | Chickos and Wilson, 1997 | AC |
Quantity | Value | Units | Method | Reference | Comment |
ΔsubH° | 38.7 ± 2.9 | kcal/mol | B | Piacente, Pompili, et al., 1991 | AC |
Reduced pressure boiling point
Tboil (K) | Pressure (atm) | Reference | Comment |
---|---|---|---|
504.5 | 0.013 | Weast and Grasselli, 1989 | BS |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
25.1 ± 0.1 | 353. | N/A | Razzouk, Naccoul, et al., 2009 | Based on data from 333. to 373. K.; AC |
26.8 | 349. | GC | Lee, Lai, et al., 2007 | Based on data from 334. to 452. K.; AC |
22.1 | 468. | N/A | Morgan and Kobayashi, 1994 | Based on data from 453. to 588. K.; AC |
30.1 ± 0.5 | 405. | TE | Piacente, Fontana, et al., 1994 | Based on data from 386. to 425. K.; AC |
22.8 | 397. | TE,ME,GS | Piacente, Pompili, et al., 1991 | Based on data from 382. to 523. K.; AC |
20.6 ± 1.1 | 474. | GS | Piacente and Scardala, 1990 | Based on data from 451. to 497. K.; AC |
26.58 | 388. | N/A | Sasse, Jose, et al., 1988 | Based on data from 373. to 463. K.; AC |
20.7 | 513. | A,EST | Stephenson and Malanowski, 1987 | Based on data from 498. to 573. K. See also Kudchadker and Zwolinski, 1966.; AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (atm)
T = temperature (K)
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Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
457.0 to 659.6 | 5.7326 | 3463.273 | -55.121 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Enthalpy of sublimation
ΔsubH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
39.41 ± 0.43 | 315. | Razzouk, Naccoul, et al., 2009 | Based on data from 308. to 323. K.; AC |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
14.18 | 324.1 | DSC | Hafsaoui and Mahmoud, 2007 | AC |
12.9 | 323.4 | DSC | Mondieig, Rajabalee, et al., 2004 | AC |
13.12 | 324.1 | N/A | Domalski and Hearing, 1996 | AC |
19.539 | 322.0 | N/A | Syunyaev, Tumanyan, et al., 1984 | Relative error in determination ± 5%.; DH |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
60.68 | 322.0 | Syunyaev, Tumanyan, et al., 1984 | Relative; DH |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
23.28 | 321.3 | Domalski and Hearing, 1996 | CAL |
40.480 | 324.1 |
Enthalpy of phase transition
ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
7.5287 | 321.1 | crystaline, II | crystaline, I | Barbillon, Schuffenecker, et al., 1991 | DH |
12.906 | 323.5 | crystaline, I | liquid | Barbillon, Schuffenecker, et al., 1991 | DH |
6.9682 | 321.0 | crystaline, II | crystaline, I | Claudy and Letoffe, 1991 | DH |
12.995 | 323.8 | crystaline, I | liquid | Claudy and Letoffe, 1991 | DH |
6.6157 | 318.90 | crystaline, II | crystaline, I | Domanska and Wyrzykowska-Stankiewicz, 1991, 2 | DH |
13.697 | 323.65 | crystaline, I | liquid | Domanska and Wyrzykowska-Stankiewicz, 1991, 2 | DH |
7.4799 | 321.35 | crystaline, II | crystaline, I | Company, 1973 | DH |
13.120 | 323.85 | crystaline, I | liquid | Company, 1973 | DH |
7.4799 | 321.25 | crystaline, II | crystaline, I | Schaerer, Busso, et al., 1955 | DH |
13.120 | 323.75 | crystaline, I | liquid | Schaerer, Busso, et al., 1955 | DH |
Entropy of phase transition
ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
23.3 | 321.35 | crystaline, II | crystaline, I | Company, 1973 | DH |
40.54 | 323.85 | crystaline, I | liquid | Company, 1973 | DH |
23.3 | 321.25 | crystaline, II | crystaline, I | Schaerer, Busso, et al., 1955 | DH |
40.51 | 323.75 | crystaline, I | liquid | Schaerer, Busso, et al., 1955 | DH |
References
Go To: Top, Condensed phase thermochemistry data, Phase change 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]
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]
Tsakalotos, 1906
Tsakalotos, D.E.,
C. R. Hebd. Seances Acad. Sci., 1906, 143, 1235. [all data]
Krafft, 1883
Krafft, F.,
Chem.-Ztg., 1883, 7, 153. [all data]
Domanska and Wyrzykowska-Stankiewicz, 1991
Domanska, U.; Wyrzykowska-Stankiewicz, D.,
Enthalpies of fusion and solid-solid transition of even-numbered paraffins docosane, hexacosane, octacosane and tetracosane,
Thermochim. Acta, 1991, 179, 265-71. [all data]
Ambrose and Tsonopoulos, 1995
Ambrose, D.; Tsonopoulos, C.,
Vapor-Liquid Critical Properties of Elements and Compounds. 2. Normal Alkenes,
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Nikitin, Pavlov, et al., 1994
Nikitin, E.D.; Pavlov, P.A.; Bessonova, N.V.,
Critical constants of n-alkanes with from 17 to 24 carbon atoms,
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Chickos and Hanshaw, 2004
Chickos, James S.; Hanshaw, William,
Vapor Pressures and Vaporization Enthalpies of the n -Alkanes from C 21 to C 30 at T = 298.15 K by Correlation Gas Chromatography,
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Chickos, Webb, et al., 2002
Chickos, James S.; Webb, Paul; Nichols, Gary; Kiyobayashi, Tetsu; Cheng, Pei-Chao; Scott, Lawrence,
The enthalpy of vaporization and sublimation of corannulene, coronene, and perylene at T= 298.15 K,
The Journal of Chemical Thermodynamics, 2002, 34, 8, 1195-1206, https://doi.org/10.1006/jcht.2002.0977
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Nichols, Orf, et al., 2000
Nichols, Gary; Orf, Jennifer; Reiter, Sarah M.; Chickos, James; Gokel, George W.,
The vaporization enthalpies of some crown and polyethers by correlation gas chromatography,
Thermochimica Acta, 2000, 346, 1-2, 15-28, https://doi.org/10.1016/S0040-6031(99)00405-0
. [all data]
Chickos and Wilson, 1997
Chickos, James S.; Wilson, Joe A.,
Vaporization Enthalpies at 298.15 K of the n -Alkanes from C 21 to C 28 and C 30,
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Piacente, Pompili, et al., 1991
Piacente, Vincenzo; Pompili, Tiziano; Scardala, Paolo; Ferro, Daniela,
Temperature dependence of the vaporization enthalpies of n-alkanes from vapour-pressure measurements,
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Razzouk, Naccoul, et al., 2009
Razzouk, Antonio; Naccoul, Ramy Abou; Mokbel, Ilham; Saab, Joseph; Jose, Jacques,
Vapor and Sublimation Pressures of Three Normal Alkanes: C 20 , C 24 , and C 28,
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Lee, Lai, et al., 2007
Lee, Ming-Jer; Lai, Cheng-Hai; Wang, Tzu-Bing; Lin, Ho-Mu,
Vapor-Liquid Equilibrium of Mixtures Containing Adipic Acid, Glutaric Acid, Dimethyl Adipate, Dimethyl Glutarate, Methanol, and Water,
J. Chem. Eng. Data, 2007, 52, 4, 1291-1296, https://doi.org/10.1021/je700027n
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Morgan and Kobayashi, 1994
Morgan, David L.; Kobayashi, Riki,
Direct vapor pressure measurements of ten n-alkanes m the 10-C28 range,
Fluid Phase Equilibria, 1994, 97, 211-242, https://doi.org/10.1016/0378-3812(94)85017-8
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Piacente, Fontana, et al., 1994
Piacente, Vincenzo; Fontana, Danilo; Scardala, Paolo,
Enthalpies of Vaporization of a Homologous Series of n-Alkanes Determined from Vapor Pressure Measurements,
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Piacente and Scardala, 1990
Piacente, Vincenzo; Scardala, Paolo,
Vaporization enthalpies and entropies of some n-alkanes,
Thermochimica Acta, 1990, 159, 193-200, https://doi.org/10.1016/0040-6031(90)80108-B
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Sasse, Jose, et al., 1988
Sasse, Karim; Jose, Jacques; Merlin, Jean-Claude,
A static apparatus for measurement of low vapor pressures. Experimental results on high molecular-weight hydrocarbons,
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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
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Kudchadker and Zwolinski, 1966
Kudchadker, A.P.; Zwolinski, B.J.,
Vapor Pressure and Boiling Points of Normal Alkanes, C 21 to C 100 .,
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Stull, 1947
Stull, Daniel R.,
Vapor Pressure of Pure Substances. Organic and Inorganic Compounds,
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Hafsaoui and Mahmoud, 2007
Hafsaoui, S.L.; Mahmoud, R.,
Solid-liquid equilibria of binary systems containing n-tetracosane with naphthalene or dibenzofuran,
J Therm Anal Calorim, 2007, 88, 2, 565-570, https://doi.org/10.1007/s10973-006-8084-2
. [all data]
Mondieig, Rajabalee, et al., 2004
Mondieig, D.; Rajabalee, F.; Metivaud, V.; Oonk, H.A.J.; Cuevas-Diarte, M.A.,
n -Alkane Binary Molecular Alloys,
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Domalski and Hearing, 1996
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Syunyaev, Tumanyan, et al., 1984
Syunyaev, Z.I.; Tumanyan, B.P.; Kolesnikov, S.I.; Zhokhova, N.I.,
Some anomalies in melting points of binary mixtures of solid hydrocarbons,
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Barbillon, Schuffenecker, et al., 1991
Barbillon, P.; Schuffenecker, L.; Dellacherie, J.; Balesdent, D.; Dirande, M.,
Variation d'enthalpie subie de 260 K a 340 K par les n-paraffines, comprises entrel'octadecane et l'hexacosane,
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Claudy and Letoffe, 1991
Claudy, P.; Letoffe, J.M.,
Phase transitions in even n-alkanes CnH2n+2, n = 16-28. Characterization by differential calorimetric analysis and by thermooptical analysis. Effect of deuteration,
Calorim. Anal. Therm., 1991, 22, 281-290. [all data]
Domanska and Wyrzykowska-Stankiewicz, 1991, 2
Domanska, U.; Wyrzykowska-Stankiewicz, D.,
Enthalpies of fusion and solid-solid transition of even-numbered paraffins docosane, hexacosane, octacosane and tetracosane,
Thermochim. Acta, 1991, 179, 265-271. [all data]
Company, 1973
Company, J.C.,
Measurement and interpretation of crystallization equilibriums of heavy paraffin and aromatic hydrocarbon solutions,
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Schaerer, Busso, et al., 1955
Schaerer, A.A.; Busso, C.J.; Smith, A.E.; Skinner, L.B.,
Properties of pure normal alkanes in the C17 to C36 range,
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Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid Cp,solid Constant pressure heat capacity of solid Pc Critical pressure S°solid,1 bar Entropy of solid at standard conditions (1 bar) Tboil Boiling point Tc Critical temperature Tfus Fusion (melting) point Ttriple Triple point temperature ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions 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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