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Heptanal

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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, Kenneth Kroenlein director
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.

Quantity Value Units Method Reference Comment
Tboil427. ± 3.KAVGN/AAverage of 25 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus227. ± 10.KAVGN/AAverage of 5 values; Individual data points
Quantity Value Units Method Reference Comment
Ttriple229.20KN/AVasil'ev and Petrov, 1984Uncertainty assigned by TRC = 0.02 K; TRC
Ttriple229.8KN/AParks, Kennedy, et al., 1956Uncertainty assigned by TRC = 0.2 K; TRC
Quantity Value Units Method Reference Comment
Tc616.7KN/AGude and Teja, 1994Uncertainty assigned by TRC = 0.6 K; by sealed ampule method; TRC
Tc161.8KN/AGude and Teja, 1994Uncertainty assigned by TRC = 0.4 K; by a flow method; TRC
Quantity Value Units Method Reference Comment
Pc31.60barN/AGude and Teja, 1994Uncertainty assigned by TRC = 0.25 bar; by the flow method; TRC
Quantity Value Units Method Reference Comment
rhoc2.30mol/lN/AGude and Teja, 1994Uncertainty assigned by TRC = 0.04 mol/l; by the sealed ampule method; TRC
Quantity Value Units Method Reference Comment
Deltavap48.7kJ/molCGCChickos, Hosseini, et al., 1995Based on data from 313. - 353. K.; AC
Deltavap47.3 ± 0.1kJ/molN/AD'yakova, Korichev, et al., 1981AC
Deltavap48. ± 1.kJ/molVNicholson, 1960Heat of formation derived by Cox and Pilcher, 1970; ALS
Deltavap48.0kJ/molN/ANicholson, 1960DRB
Deltavap48.0 ± 1.3kJ/molEBTurvey, Evans, et al., 1960See also Verevkin, Krasnykh, et al., 2003.; AC

Reduced pressure boiling point

Tboil (K) Pressure (bar) Reference Comment
332.80.040Weast and Grasselli, 1989BS

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Reference Comment
62.0300.Stull, 1947Based on data from 285. - 428. K.; 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
285. - 428.2.60077686.453-161.333Stull, 1947Coefficents calculated by NIST from author's data.

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Reference Comment
22.89229.3D'yakova and Vasil'ev, 1980AC
23.585229.8Parks, Kennedy, et al., 1956, 2DH

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
102.63229.8Parks, Kennedy, et al., 1956, 2DH

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.

Vasil'ev and Petrov, 1984
Vasil'ev, I.A.; Petrov, V.M., Thermodynamic Properties of Oxygen-containing Organic Compounds, Handbook, Soedinenii: Khimya, Leningrad, p 240, 1984. [all data]

Parks, Kennedy, et al., 1956
Parks, G.S.; Kennedy, W.D.; Gates, R.R.; Mosley, J.R.; Moore, G.E.; Renquist, M.L., Thermal Data on Organic Compounds XXVI. Some Heat Capacity, Entropy and Free Energy Data for Seven Compounds Containing Oxygen, J. Am. Chem. Soc., 1956, 78, 56-9. [all data]

Gude and Teja, 1994
Gude, M.T.; Teja, A.S., The Critical Properties of Several n-Alkanals, Tetralin and NMP, Experimental Results for DIPPR 1990-91 Projects on Phase Equilibria and Pure Component Properties, 1994, 1994, DIPPR Data Series No. 2, p.174-83. [all data]

Chickos, Hosseini, et al., 1995
Chickos, James S.; Hosseini, Sarah; Hesse, Donald G., Determination of vaporization enthalpies of simple organic molecules by correlations of changes in gas chromatographic net retention times, Thermochimica Acta, 1995, 249, 41-62, https://doi.org/10.1016/0040-6031(95)90670-3 . [all data]

D'yakova, Korichev, et al., 1981
D'yakova, G.N.; Korichev, G.L.; Korkhova, A.D.; Vasil'eva, T.F.; Vasil'ev, I.A., Zh. Prikl. Khim. (Leningrad), 1981, 54, 1644. [all data]

Nicholson, 1960
Nicholson, G.R., 478. The heats of combustion of butanal and heptanal, J. Chem. Soc., 1960, 2377-2378. [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]

Turvey, Evans, et al., 1960
Turvey, J.R.; Evans, J.M.; Bhavanandan, V.P.; Wannigama, G.P.; Biddle, P.; Lane, E.S.; Willans, J.L.; Swinbourne, E.S.; Giral, F.; Hahn, L. Rodriguez; Hargreaves, G.B.; Peacock, R.D.; Schoental, R.; Cambie, R.C.; Nicholson, G.R., Notes, J. Chem. Soc., 1960, 2366, https://doi.org/10.1039/jr9600002366 . [all data]

Verevkin, Krasnykh, et al., 2003
Verevkin, Sergey P.; Krasnykh, Eugen L.; Vasiltsova, Tatiana V.; Koutek, Bohumir; Doubsky, Jan; Heintz, Andreas, Vapor pressures and enthalpies of vaporization of a series of the linear aliphatic aldehydes, Fluid Phase Equilibria, 2003, 206, 1-2, 331-339, https://doi.org/10.1016/S0378-3812(03)00035-9 . [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]

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]

D'yakova and Vasil'ev, 1980
D'yakova, G.N.; Vasil'ev, I.A., Study of the thermodynamic properties of octanal and decanal, B.S.R. Inst. Neftekhim. Protsessov (Leningrad), 1980, (1), 51. [all data]

Parks, Kennedy, et al., 1956, 2
Parks, G.S.; Kennedy, W.D.; Gates, R.R.; Mosley, J.R.; Moore, G.E.; Renquist, M.L., Thermal data on organic compounds. XXVI. Some heat capacity, entropy and free energy data for seven compounds containing oxygen., Not In System, 1956, 78, 56-59. [all data]


Notes

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