Vapour pressures of common liquids

Saturated vapour pressures of diethyl ether, acetone, ethanol, water and toluene at several temperatures, with their normal boiling points and enthalpies of vaporization. The vapour-pressure curves and boiling-point–altitude relations on this site are computed from these equations.


Diethyl ether	$\ce{(C2H5)2O}$	24.79	71.43	170.8	34.50	26.52	A=4.13377, B=1102.878, C=-40.46 (212.4–330 K)
Acetone	$\ce{CH3COCH3}$	9.40	30.60	81.4	56.05	29.10	A=4.42448, B=1312.253, C=-32.445 (259.16–507.6 K)
Ethanol	$\ce{C2H5OH}$	1.59	7.89	29.4	78.29	38.56	A=5.37229, B=1670.409, C=-40.191 (273–351.7 K); A=5.24677, B=1598.673, C=-46.424 (351.7–366.63 K)
Water	$\ce{H2O}$	0.61	3.17	12.4	99.97	40.65	IAPWS-IF97
Toluene	$\ce{C6H5CH3}$	0.91	3.81	12.3	110.63	33.18	A=4.23679, B=1426.448, C=-45.957 (273.13–303 K); A=4.07827, B=1343.943, C=-53.773 (303–384.66 K)

The ether fit was made for 212–293 K and is extended here to 330 K, where it is within about 0.2 K at the normal boiling point; ethanol and toluene at 0 °C are slight extrapolations.

Sources

NIST Chemistry WebBook, SRD 69: Antoine parameters, log10(p/bar) = A − B/(T/K + C) (ethanol: Kretschmer & Wiebe 1949, Ambrose & Sprake 1970; acetone: Ambrose et al. 1974; diethyl ether: Taylor & Smith 1922; toluene: Besley & Bottomley 1974, Williamham et al. 1945).
IAPWS-IF97 region-4 saturation equations (water).
W. M. Haynes (ed.), CRC Handbook of Chemistry and Physics, 97th ed. (2016): normal boiling points and enthalpies of vaporization.

Used in these lessons

Vapour pressure and boiling