Tables show (latent) heat of vaporization of various chemical substances under normal conditions (1013,25 hPa, 25 °C).

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Unit (enthalpy of vaporization)
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metals#

Substance	Molecular formula	Enthalpy of vaporization [kJ / mol]	Enthalpy of vaporization [kJ / kg]
aluminum (pure)	Al	294	10896.34
iron	Fe	340	6088.26

liquids#

Substance	Molecular formula	Enthalpy of vaporization [kJ / mol]	Enthalpy of vaporization [kJ / kg]
acetone	(CH₃)₂CO	31.3	538.91
ethanol	C₂H₅OH	38.6	837.86
water 25°C	H₂O	40.66	2256.97
n-hexane	C₆H₁₄	31.52	365.75
methanol	CH₃OH	35.2	1098.63
benzene	C₆H₆	33.83	433.05
diethyl ethere	(C₂H₅)₂O	26.17	353.08
n-pentane	C₅H₁₂	26.42	366.18
n-heptane	C₇H₁₆	36.57	364.93
n-octane	C₈H₁₈	41.56	363.83
n-nonane	C₉H₂₀	46.55	363.1
n-decane	C₁₀H₂₂	51.42	361.37
undecane	C₁₁H₂₄	56.58	361.97
dodecane	C₁₂H₂₆	61.52	361.18
tridecane	C₁₃H₂₈	66.68	361.66
tetradecane	C₁₄H₃₀	71.73	361.56
hexadecane	C₁₆H₃₄	81.35	359.3
propan-2-ol (isopropyl alcohol)	C₃H₇OH	44	732.11
hexafluoronenzene	C₆F₆	35.71	191.93

alcohols#

Substance	Molecular formula	Enthalpy of vaporization [kJ / mol]	Enthalpy of vaporization [kJ / kg]
ethanol	C₂H₅OH	38.6	837.86
methanol	CH₃OH	35.2	1098.63
propan-2-ol (isopropyl alcohol)	C₃H₇OH	44	732.11

other inorganic#

Substance	Molecular formula	Enthalpy of vaporization [kJ / mol]	Enthalpy of vaporization [kJ / kg]
ammonia	NH₃	23.35	1371.11
phosphine	PH₃	14.6	429.41

gases#

Substance	Molecular formula	Enthalpy of vaporization [kJ / mol]	Enthalpy of vaporization [kJ / kg]
ammonia	NH₃	23.35	1371.11
hydrogen	H₂	0.46	228.19
methane	CH₄	8.17	509.35
nitrogen	N₂	198.2	7075.19
propane	C₃H₈	15.7	356.01
n-buthane	C₄H₁₀	21	361.32
phosphine	PH₃	14.6	429.41

hydrocarbons#

Substance	Molecular formula	Enthalpy of vaporization [kJ / mol]	Enthalpy of vaporization [kJ / kg]
methane	CH₄	8.17	509.35
n-hexane	C₆H₁₄	31.52	365.75
propane	C₃H₈	15.7	356.01
n-buthane	C₄H₁₀	21	361.32
benzene	C₆H₆	33.83	433.05
n-pentane	C₅H₁₂	26.42	366.18
n-heptane	C₇H₁₆	36.57	364.93
n-octane	C₈H₁₈	41.56	363.83
n-nonane	C₉H₂₀	46.55	363.1
n-decane	C₁₀H₂₂	51.42	361.37
undecane	C₁₁H₂₄	56.58	361.97
dodecane	C₁₂H₂₆	61.52	361.18
tridecane	C₁₃H₂₈	66.68	361.66
tetradecane	C₁₄H₃₀	71.73	361.56
hexadecane	C₁₆H₃₄	81.35	359.3
octadecane	C₁₈H₃₈	91.44	359.29
isocane (eicosane)	C₂₀H₄₂	101.81	360.33
naphthalene	C₁₀H₈	55.65	434.19

other organic#

Substance	Molecular formula	Enthalpy of vaporization [kJ / mol]	Enthalpy of vaporization [kJ / kg]
diethyl ethere	(C₂H₅)₂O	26.17	353.08
hexafluoronenzene	C₆F₆	35.71	191.93

solids#

Substance	Molecular formula	Enthalpy of vaporization [kJ / mol]	Enthalpy of vaporization [kJ / kg]
octadecane	C₁₈H₃₈	91.44	359.29
isocane (eicosane)	C₂₀H₄₂	101.81	360.33
naphthalene	C₁₀H₈	55.65	434.19

Some facts#

The enthalpy of vaporization tells us how much energy should be added (i.e. amount of the work that should be done) to move one mole of substance from the liquid state into gas state without changing the pressure and temperature.

$\Delta H_{vap.} = H_{gas} - H_{liquid}$
where:
- $\Delta H_{vap.}$ - enthalpy of vaporization,
- $H_{gas}$ - enthalpy of formation in gas state,
- $H_{liquid}$ - enthalpy of formation in liquid state.
Basic unit of enthalpy of vaporization in SI system is joul per mole:

$\dfrac{J}{mol}$

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