Section: 6 | Enthalpy of Vaporization |

How to Cite this Reference

ENTHALPY OF VAPORIZATION

The molar enthalpy (heat) of vaporization ∆_vapH, which is defined as the enthalpy change in the conversion of one mole of liquid to gas at constant temperature, is tabulated here for about 950 inorganic and organic compounds. Values are given, when available, both at the normal boiling point t_b, referred to a pressure of 101.325 kPa (760 mmHg), and at 25 °C.

The values in this table were measured either by calorimetric techniques or by application of the Claperyon equation to the variation of vapor pressure with temperature. See Ref. 1 for a discussion of the accuracy of different experimental techniques and methods of estimating enthalpy of vaporization at other temperatures. Several of the references present empirical techniques for correlating enthalpy of vaporization with molecular structure.

Column definitions for the table are as follows.

Column heading	Definition
Name	Name of compound; compounds are listed alphabetically by systematic name
Mol. form.	Compound formula
t_bp	Boiling point, in °C
Δ_vapH(t_b)	Molar enthalpy of vaporization at normal boiling point, in units kJ mol^-1
Δ_vapH(25 °C)	Molar enthalpy of vaporization at 25 °C, in units kJ mol^-1
Ref.	Reference for data values

References

Majer, V., and Svoboda, V., Enthalpies of Vaporization of Organic Compounds, Blackwell Scientific Publications, Oxford, 1985.
Chase, M. W., Davies, C. A., Downey, J. R., Frurip, D. J., McDonald, R. A., and Syverud, A. N., JANAF Thermochemical Tables, Third Edition, J. Phys. Chem. Ref. Data 14, Suppl. 1, 1985.
Landolt-Börnstein, Numerical Data and Functional Relationships in Science and Technology, Sixth Edition, II/4, Caloric Quantities of State, Springer-Verlag, Heidelberg, 1961.
Daubert, T. E., Danner, R. P., Sibul, H. M., and Stebbins, C. C., Physical and Thermodynamic Properties of Pure Compounds: Data Compilation, extant 1994 (core with 4 supplements), Taylor & Francis, Bristol, PA.
Ruzicka, K., and Majer, V., Simultaneous Treatment of Vapor Pressures and Related Thermal Data between the Triple and Normal Boiling Temperatures for n-Alkanes C5–C20, J. Phys. Chem. Ref. Data 23, 1, 1994. [https://doi.org/10.1063/1.555942]
Verevkin, S. P., Thermochemistry of Amines: Experimental Standard Molar Enthalpies of Formation of Some Aliphatic and Aromatic Amines, J. Chem. Thermodynamics 29, 891, 1997. [https://doi.org/10.1006/jcht.1997.0212]
Cady, G. H., and Hargreaves, G. B., The Vapor Pressure of Some Heavy Transition Metal Hexafluorides, J. Chem. Soc. 1563, 1578, 1961. [https://doi.org/10.1039/jr9610001563]
Steele, W. V., Chirico, R. D., Knipmeyer, S. E., and Nguyen, A., J. Chem. Eng. Data 41, 1255, 1996. [https://doi.org/10.1021/je9601117]
Nichols, G., et al., J. Chem. Eng. Data 51, 475, 2006.
Dias, A. M. A., et al., J. Chem. Eng. Data 50, 1328, 2005. [https://doi.org/10.1021/je050056e]
Umnahanant, p., et al., J. Chem. Eng. Data 51, 2246, 2006. [https://doi.org/10.1021/je060333x]
Raganov, G. N., Pisarev, P. N., and Emel’yanenko, V. N., J. Chem. Eng. Data 50, 1114, 2005.
Verevkin, S. P., et al., J. Chem. Eng. Data 51, 1896, 2006. [https://doi.org/10.1021/je0602418]
Verevkin, S. P., J. Chem. Thermodynamics 38, 1111, 2006. [https://doi.org/10.1016/j.jct.2005.11.009]
Lide, D. R., Handbook of Organic Solvents, CRC Press, Boca Raton, FL, 1995.
Steele, W. V., Chirico, R. D., Nguyen, A., and Knipmeyer, S. E., J. Chem. Thermodynamics 27, 322, 1995. [https://doi.org/10.1006/jcht.1995.0149]
Ribeiro da Silva, M., et al., J. Chem. Thermodynamics 27, 565, 1995. [https://doi.org/10.1006/jcht.1995.0057]
Kabo, G. J., et al., J. Chem. Thermodynamics 27, 953, 1995. [https://doi.org/10.1006/jcht.1995.0101]
Duarte-Garza, H. A., et al., J. Chem. Eng. Data 42, 497, 1997. [https://doi.org/10.1021/je9603584]
Steele, W. V., and Chirico, R. D., J. Phys. Chem. Ref. Data 22, 377, 1993. [https://doi.org/10.1063/1.555937]
Linstrom, P. J., and Mallard, W. G., Eds., NIST Chemistry WebBook, NIST Standard Reference Database No. 69, June 2005, National Institute of Standards and Technology, Gaithersburg, MD, <http://webbook.nist.gov>.
Weber, L. A. and Defibaugh, D. R., J. Chem. Eng. Data 41, 1477, 1996. [https://doi.org/10.1021/je9602071]
Riddick, J. A., Bunger, W. B., and Sakano, T. K., Organic Solvents, Fourth Edition, John Wiley & Sons, New York, 1986.

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Molar Enthalpy of Vaporization at the Boiling Point and at 25 °C

Name	Synonym	Mol. form.	Formula	CAS Reg. No.	Mol. Wt.	t_bp/ºC	Δ_vapH(t_b)/ kJ mol^-1	Δ_vapH(25 ºC)/ kJ mol^-1	Ref.
Continued on next page...
Acetaldehyde	Ethanal	C₂H₄O	CH₃CHO	75-07-0	44.052	20.8	25.76	25.47	1
Acetic acid	Ethanoic acid	C₂H₄O₂	CH₃COOH	64-19-7	60.052	117.9	23.70	23.36	1
Acetic anhydride	Acetyl acetate	C₄H₆O₃	C₄H₆O₃	108-24-7	102.089	139.5	38.2
Acetone	2-Propanone	C₃H₆O	(CH₃)₂CO	67-64-1	58.079	56.08	29.10	30.99	1
Acetonitrile	Methyl cyanide	C₂H₃N	CH₃CN	75-05-8	41.052	81.6	29.75	32.94	1
Acetophenone	Methyl phenyl ketone	C₈H₈O	C₆H₅C=OCH₃	98-86-2	120.149	202.1	43.98	55.40	8
Acrolein	2-Propenal	C₃H₄O	CH₂=CHCHO	107-02-8	56.063	52.3	28.3
Acrylonitrile	Propenenitrile	C₃H₃N	CH₂=CHCN	107-13-1	53.063	77.2	32.6
Allyl acetate	3-Acetoxypropene	C₅H₈O₂		591-87-7	100.117	104	36.3
Allyl alcohol	2-Propen-1-ol	C₃H₆O	C₃H₆O	107-18-6	58.079	96.9	40.0
Aluminum		Al	Al	7429-90-5	26.982	2519	294
Aluminum borohydride	Aluminum tetrahydroborate	AlB₃H₁₂	Al(BH₄)₃	16962-07-5	71.510	44.5	30
Aluminum bromide	Aluminum tribromide	AlBr₃	AlBr₃	7727-15-3	266.694	255	23.5
Aluminum iodide	Aluminum triiodide	AlI₃	AlI₃	7784-23-8	407.695	382	32.2
2-Amino-2-methyl-1-propanol	AMP	C₄H₁₁NO		124-68-5	89.136	163.8	50.6
Ammonia	R-717	H₃N	NH₃	7664-41-7	17.031	-33.32	23.33	19.86
Aniline	Benzenamine	C₆H₇N	C₆H₅NH₂	62-53-3	93.127	184.1	42.44	55.83	1
Anisole	Methoxybenzene	C₇H₈O	C₇H₈O	100-66-3	108.138	153.6	38.97	46.90	1
Antimony(III) bromide	Antimony tribromide	Br₃Sb	SbBr₃	7789-61-9	361.472	288	59

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