Home Symbol which looks like a small house Up Solid circle with an upward pointer in it

NOTICE: Due to scheduled maintenance at our Gaithersburg campus, this site will not be available from 5:00 pm EDT (21:00 UTC) on Friday October 25 until 5:00 pm (21:00 UTC) on Sunday October 27. We apologize for any inconvenience this outage may cause.

Heptane

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.


Critical density

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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny, director

rhoc (mol/l) Reference Comment
2.34 ± 0.03Ambrose and Tsonopoulos, 1995 
2.32Steele, 1992Uncertainty assigned by TRC = 0.10 mol/l; TRC
2.33Anselme, Gude, et al., 1990Uncertainty assigned by TRC = 0.06 mol/l; TRC
2.32Teja, Lee, et al., 1989TRC
2.34Kobe and Mathews, 1970Uncertainty assigned by TRC = 0.05 mol/l; TRC
2.32McMicking and Kay, 1965Uncertainty assigned by TRC = 0.05 mol/l; TRC
2.41Kobe, Crawford, et al., 1955Uncertainty assigned by TRC = 0.15 mol/l; TRC
2.3420Kay, 1941Uncertainty assigned by TRC = 0.016 mol/l; TRC
2.3424Kay, 1938Uncertainty assigned by TRC = 0.016 mol/l; TRC
2.41Beattie and Kay, 1937Uncertainty assigned by TRC = 0.02 mol/l; based on obs. pvt isottherms; TRC
2.41Smith, Beattie, et al., 1937Uncertainty assigned by TRC = 0.05 mol/l; TRC
2.336Young, 1910Uncertainty assigned by TRC = 0.03 mol/l; extrapolate obs. dens. to Tc; TRC

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, Critical density, Notes

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

Ambrose and Tsonopoulos, 1995
Ambrose, D.; Tsonopoulos, C., Vapor-Liquid Critical Properties of Elements and Compounds. 2. Normal Alkenes, J. Chem. Eng. Data, 1995, 40, 531-546. [all data]

Steele, 1992
Steele, W.V., Personal Commun. 1992 1992, 1992. [all data]

Anselme, Gude, et al., 1990
Anselme, M.J.; Gude, M.; Teja, A.S., The Critical Temperatures and Densities of the n-Alkanes from Pentane to Octadecane, Fluid Phase Equilib., 1990, 57, 317-26. [all data]

Teja, Lee, et al., 1989
Teja, A.S.; Lee, R.J.; Rosenthal, D.J.; Anselme, M.J., Correlation of the Critical Properties of Alkanes and Alkanols in 5th IUPAC Conference on Alkanes and AlkanolsGradisca, 1989. [all data]

Kobe and Mathews, 1970
Kobe, K.A.; Mathews, J.F., Critical Properties and Vapor Pressures of Some Organic Nitrogen and Oxygen Compounds, J. Chem. Eng. Data, 1970, 15, 182. [all data]

McMicking and Kay, 1965
McMicking, J.H.; Kay, W.B., Vapor Pressures and Saturated Liquid and Vapor Densities of The Isomeric Heptanes and Isomeric Octanes, Proc., Am. Pet. Inst., Sect. 3, 1965, 45, 75-90. [all data]

Kobe, Crawford, et al., 1955
Kobe, K.A.; Crawford, H.R.; Stephenson, R.W., Critical Properties and Vapor Pressures of Some Ketones, Ind. Eng. Chem., 1955, 47, 1767-72. [all data]

Kay, 1941
Kay, W.B., Liquid-Vapor Equil. Relations in Binary Systems. Butane-Heptane Syst. System, Ind. Eng. Chem., 1941, 33, 590-4. [all data]

Kay, 1938
Kay, W.B., Liquid-Vapor Phase Equilibrium Relations in the Ethane-n-Heptane Syst., Ind. Eng. Chem., 1938, 30, 459-65. [all data]

Beattie and Kay, 1937
Beattie, J.A.; Kay, W.C., The Normal Boiling Point and Critical Constants of Normal Heptane, J. Am. Chem. Soc., 1937, 59, 1586. [all data]

Smith, Beattie, et al., 1937
Smith, L.B.; Beattie, J.A.; Kay, W.C., The compressibility of liquid and gaseous normal heptane and an equation of state for gaseous normal heptane, J. Am. Chem. Soc., 1937, 59, 1587-9. [all data]

Young, 1910
Young, S., The Internal Heat of Vaporization constants of thirty pure substances, Sci. Proc. R. Dublin Soc., 1910, 12, 374. [all data]


Notes

Go To: Top, Critical density, References