Hydrocarbons - Vapor Pressures

Vapor pressure vs. temperature for propane, n-butane, n-heptane and n-pentane hydrocarbons.

Temperature (°C)	Propane (bar)	n-Butane (bar)	n-Pentane (bar)	n-Heptane (bar)
-40	4	0.5	0.1	0.01
-20	8.5	1.5	0.4	0.05
0	16.5	4	1	0.15
20	29	8.5	2.3	0.4
40	47	16	5	1
60	72	28	10	2.2
80	102	46	18.5	4.5
100	138	72	32	8.5