Heptanedioic acid

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Phase change data

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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

Quantity Value Units Method Reference Comment
Tfus377.5KN/ABerchiesi, 1981Uncertainty assigned by TRC = 0.4 K; TRC
Tfus377.5KN/AGioia Lobbia, 1981Uncertainty assigned by TRC = 0.3 K; TRC
Tfus378.KN/AKhetarpal, Lal, et al., 1980Uncertainty assigned by TRC = 1.5 K; TRC
Tfus377.5KN/ACingolani and Berchiesi, 1974Crystal phase 1 phase; Uncertainty assigned by TRC = 0.5 K; TRC
Quantity Value Units Method Reference Comment
Δvap112.0 ± 0.8kJ/molCGCRoux, Temprado, et al., 2005Based on data from 424. to 503. K.; AC
Quantity Value Units Method Reference Comment
Δsub139.9 ± 1.0kJ/molN/ARibeiro da Silva, Monte, et al., 1999AC

Reduced pressure boiling point

Tboil (K) Pressure (bar) Reference Comment
485.20.013Aldrich Chemical Company Inc., 1990BS

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
88.6451.AStephenson and Malanowski, 1987Based on data from 436. to 615. K. See also Stull, 1947.; AC

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Temperature (K) A B C Reference Comment
436.6 to 615.36.674323943.314-23.802Stull, 1947Coefficents calculated by NIST from author's data.

Enthalpy of sublimation

ΔsubH (kJ/mol) Temperature (K) Method Reference Comment
153. ± 4.328. to 363.TPDCappa, Lovejoy, et al., 2007AC
124.283. to 300.TPTDChattopadhyay and Ziemann, 2005AC
80.8318. to 336.TPTDChattopadhyay and Ziemann, 2005AC
178.288. to 308.TPTDChattopadhyay, Tobias, et al., 2001Values based on the TPTD method are not consistent with values determined by other experimental methods; AC

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Reference Comment
23.7368.2Roux, Temprado, et al., 2005AC
27.62377.5Acree, 1993AC

Enthalpy of phase transition

ΔHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
1.000369.7crystaline, IIcrystaline, IPetropavlov, Tsygankova, et al., 1988DH
1.322369.0crystaline, IIcrystaline, ICingolani and Berchiesi, 1974DH
27.623377.5crystaline, IliquidCingolani and Berchiesi, 1974DH

Entropy of phase transition

ΔStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
2.7369.7crystaline, IIcrystaline, IPetropavlov, Tsygankova, et al., 1988DH
3.60369.0crystaline, IIcrystaline, ICingolani and Berchiesi, 1974DH
73.18377.5crystaline, IliquidCingolani and Berchiesi, 1974DH

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


References

Go To: Top, Phase change data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Berchiesi, 1981
Berchiesi, M.A., Int. DATA Ser., Sel. Data Mixtures, Ser. A, 1981, No. 2, 123. [all data]

Gioia Lobbia, 1981
Gioia Lobbia, G., Int. DATA Ser., Sel. Data Mixtures, Ser. A, 1981, No. 1, 46. [all data]

Khetarpal, Lal, et al., 1980
Khetarpal, S.C.; Lal, K.; Bhatnagar, H.I., Indian J. Chem., Sect. A:Inorg., Phys., Theor. Anal., 1980, 19A, 516. [all data]

Cingolani and Berchiesi, 1974
Cingolani, A.; Berchiesi, G., Thermodynamic properties of organic compounds. 1. A DSC study of phase transitions in aliphatic dicarboxylic acids, J. Therm. Anal., 1974, 6, 87-90. [all data]

Roux, Temprado, et al., 2005
Roux, Maria Victoria; Temprado, Manuel; Chickos, James S., Vaporization, fusion and sublimation enthalpies of the dicarboxylic acids from C4 to C14 and C16, The Journal of Chemical Thermodynamics, 2005, 37, 9, 941-953, https://doi.org/10.1016/j.jct.2004.12.011 . [all data]

Ribeiro da Silva, Monte, et al., 1999
Ribeiro da Silva, Manuel A.V.; Monte, Manuel J.S.; Ribeiro, José R., Vapour pressures and the enthalpies and entropies of sublimation of five dicarboxylic acids, The Journal of Chemical Thermodynamics, 1999, 31, 8, 1093-1107, https://doi.org/10.1006/jcht.1999.0522 . [all data]

Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc., Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]

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 . [all data]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Cappa, Lovejoy, et al., 2007
Cappa, Christopher D.; Lovejoy, Edward R.; Ravishankara, A.R., Determination of Evaporation Rates and Vapor Pressures of Very Low Volatility Compounds: A Study of the C 4 -C 10 and C 12 Dicarboxylic Acids, J. Phys. Chem. A, 2007, 111, 16, 3099-3109, https://doi.org/10.1021/jp068686q . [all data]

Chattopadhyay and Ziemann, 2005
Chattopadhyay, Sulekha; Ziemann, Paul J., Vapor Pressures of Substituted and Unsubstituted Monocarboxylic and Dicarboxylic Acids Measured Using an Improved Thermal Desorption Particle Beam Mass Spectrometry Method, Aerosol Science and Technology, 2005, 39, 11, 1085-1100, https://doi.org/10.1080/02786820500421547 . [all data]

Chattopadhyay, Tobias, et al., 2001
Chattopadhyay, Sulekha; Tobias, Herbert J.; Ziemann, Paul J., A Method for Measuring Vapor Pressures of Low-Volatility Organic Aerosol Compounds Using a Thermal Desorption Particle Beam Mass Spectrometer, Anal. Chem., 2001, 73, 16, 3797-3803, https://doi.org/10.1021/ac010304j . [all data]

Acree, 1993
Acree, William E., Thermodynamic properties of organic compounds, Thermochimica Acta, 1993, 219, 97-104, https://doi.org/10.1016/0040-6031(93)80486-T . [all data]

Petropavlov, Tsygankova, et al., 1988
Petropavlov, N.N.; Tsygankova, I.G.; Teslenko, L.A., Microcalorimetric investigation of polymorphic transitions in organic crystals, Sov. Phys. Crystallogr., 1988, 33(6), 853-855. [all data]


Notes

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