Hexanoic acid, 2-ethyl-

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.


Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Δfgas-559.5 ± 2.1kJ/molCcrStridh, 1976 

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Δfliquid-635.1 ± 2.0kJ/molCcrStridh, 1976 
Quantity Value Units Method Reference Comment
Δcliquid-4799.6 ± 1.7kJ/molCcrStridh, 1976Corresponding Δfliquid = -635.14 kJ/mol (simple calculation by NIST; no Washburn corrections)

Phase change data

Go To: Top, Gas phase thermochemistry data, 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
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Tboil501.2KN/AAldrich Chemical Company Inc., 1990BS
Quantity Value Units Method Reference Comment
Tc675.KN/ASteele, Chirico, et al., 1997Uncertainty assigned by TRC = 5. K; derived from fit of obs. vapor pressure; TRC
Tc673.6KN/ATeja and Anselme, 1990Uncertainty assigned by TRC = 1.2 K; TRC
Tc674.6KN/ATeja and Rosenthal, 1990Uncertainty assigned by TRC = 0.8 K; TRC
Quantity Value Units Method Reference Comment
Pc27.80barN/ASteele, Chirico, et al., 1997Uncertainty assigned by TRC = 3.00 bar; derived from fit of obs. vapor pressure; TRC
Pc27.78barN/ATeja and Rosenthal, 1990Uncertainty assigned by TRC = 0.40 bar; TRC
Quantity Value Units Method Reference Comment
ρc1.803mol/lN/ASteele, Chirico, et al., 1997Uncertainty assigned by TRC = 0.10 mol/l; TRC
ρc1.89mol/lN/ATeja and Anselme, 1990Uncertainty assigned by TRC = 0.04 mol/l; TRC
Quantity Value Units Method Reference Comment
Δvap76.3 ± 0.9kJ/molEBSteele, Chirico, et al., 1997, 2Based on data from 397. to 514. K.; AC
Δvap75.60 ± 0.42kJ/molCStridh, 1976ALS
Δvap75.6 ± 0.5kJ/molCStridh, 1976AC

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
61.8418.AStephenson and Malanowski, 1987Based on data from 403. to 500. K.; AC

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, Gas phase thermochemistry data, 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.

Stridh, 1976
Stridh, G., Enthalpy of formation of 2-ethylhexanoic acid, J. Chem. Thermodyn., 1976, 8, 193-194. [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]

Steele, Chirico, et al., 1997
Steele, W.V.; Chirico, R.D.; Knipmeyer, S.E.; Nguyen, A., Vapor Pressure, Heat Capacity, and Density along the Saturted Line, Measurements for Cyclohexanol, 2-Cyclohexen-1-one, 1,2-Dichloropropane, 1,4-Di-tert-butylbenzene, (±)-2-Ethylhexanoic Acid, 1-(m, J. Chem. Eng. Data, 1997, 42, 1021-36. [all data]

Teja and Anselme, 1990
Teja, A.S.; Anselme, M.J., The critical properties of thermally stable and unstable fluids. II. 1986 results, AIChE Symp. Ser., 1990, 86, 279, 122-7. [all data]

Teja and Rosenthal, 1990
Teja, A.S.; Rosenthal, D.J., The Critical Pressures and Temperatures of Twelve Substances Using A Low Residence Time Flow Apparatus, AIChE Symp. Ser., 1990, 86, 279, 133-7. [all data]

Steele, Chirico, et al., 1997, 2
Steele, W.V.; Chirico, R.D.; Knipmeyer, S.E.; Nguyen, A., Vapor Pressure, Heat Capacity, and Density along the Saturation Line, Measurements for Cyclohexanol, 2-Cyclohexen-1-one, 1,2-Dichloropropane, 1,4-Di- tert -butylbenzene, (±)-2-Ethylhexanoic Acid, 2-(Methylamino)ethanol, Perfluoro- n -heptane, and Sulfolane, J. Chem. Eng. Data, 1997, 42, 6, 1021-1036, https://doi.org/10.1021/je9701036 . [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]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, References