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 OALibJ  Vol.2 No.9 , September 2015
Using the Vapor Pressure of Pure Volatile Organic Compounds to Predict the Enthalpy of Vaporization and Computing the Entropy of Vaporization
Abstract: The objective of this investigation was to develop a vapor pressure (VP) acquisition system and methodology for performing temperature-dependent VP measurements and predicting the enthalpy of vaporization (ΔHvap) of volatile organic compounds, i.e. VOCs. High quality VP data were acquired for acetone, ethanol, and toluene. VP data were also obtained for water, which served as the system calibration standard. The empirical VP data were in excellent agreement with its reference data confirming the reliability/performance of the system and methodology. The predicted values of ΔHvap for water (43.3 kJ/mol, 1.0%), acetone (31.4 kJ/mol; 3.4%), ethanol (42.0 kJ/mol; 1.0%) and toluene (35.3 kJ/mol; 5.4%) were in excellent agreement with the literature. The computed values of ΔSvap for water (116.0 J/mol·K), acetone (95.2 J/mol·K), ethanol (119.5 J/mol·K) and toluene (92.0.J/mol·K) compared also favorably to the literature.
Cite this paper: Abernathy, S. and Brown, K. (2015) Using the Vapor Pressure of Pure Volatile Organic Compounds to Predict the Enthalpy of Vaporization and Computing the Entropy of Vaporization. Open Access Library Journal, 2, 1-7. doi: 10.4236/oalib.1101927.
References

[1]   Girard, J.E. (2005) Principles of Environmental Chemistry. Jones and Bartlett Publishers, MA.

[2]   Gopinathan, N. and Sarai, D.N. (2001) Predict Heat of Vaporization of Crudes and Pure Components Revised II. Fluid Phase Equilibria, 179, 277-284.
http://dx.doi.org/10.1016/S0378-3812(00)00501-X

[3]   Andersen, V.F., Andersen, J.E., Wallington, T.J., Mueller, S.A. and Nielsen, O.J. (2010) Vapor Pressure of Alcohol-Gasoline Blends. Energy Fuels, 24, 3647-3654.
http://dx.doi.org/10.1021/ef100254w

[4]   Andrae, J.C.G., Brinck, T. and Kalghatgi, T.B. (2008) HCCI Experiment with Toluene Reference Fuels Modeled by a Semidetailed Chemical Kinetic Model. Combustion and Flame, 155, 696-712.
http://dx.doi.org/10.1016/j.combustflame.2008.05.010

[5]   Pitz, W.J., Cernansky, N.P., Dryer, F.L., Egolfopoulos, F.N., Farrell, J.T., Friend, D.G. and Pitsch, H. (2007) Development of an Experimental Database and Kinetic Models for Surrogate Diesel Fuels. SAE Technical Paper, 2007-01-0175.
http://papers.sae.org./2007-01-0175/

[6]   Andrae, J.C.G. and Head, R.A. (2009) HCCI Experiment with Gasoline Surrogate Fuel Modeled by a Semidetailed Chemical Kinetic Model. Combustion and Flame, 156, 842-851.
http://dx.doi.org/10.1016/j.combustflame.2008.10.002

[7]   Pichter, H. and Lutz, J. (2014) Why Crude Oil Vapor Pressure Should Be Tested Prior to Rail Transport. Advances in Petroleum Exploration and Development, 7, 58-61.

[8]   Garland, C.W., Nibler, J.W. and Shoemaker, D.P. (2009) Experiments in Physical Chemistry. 8th Edition, McGraw-Hill, New York.

[9]   Atkins, P. and Paula, J. (2010) Physical Chemistry. 9th Edition, W. H. Freeman Co., New York.

[10]   Weast, R.C., Astle, M.J. and Beyer, W.H. (1984) CRC Handbook of Chemistry and Physics. CRC Press, Boca Raton, 199-214.

[11]   http://webbook.nist.gov/chemistry/form-ser.html

 
 
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