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Liquids - Vapor Pressures

Vapor and saturation pressure for some common liquids.

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The vapor pressure of a liquid is defined as the pressure exerted by the molecules that escapes from the liquid to form a separate vapor phase above the liquid surface.

The pressure exerted by the vapor phase is called the

vapor or saturation pressure

Vapor or saturation pressure depends on temperature.

If a fluid consist of more than one component (a solution), components with

higher vapor pressure are called light components
lower vapor pressure are called heavy components

Temperature and Vapor or Saturation Pressure for some common Fluids

At atmospheric pressure saturation temperature of

water : 100 ^oC (212 ^oF)
ethyl alcohol : 78.5 ^oC (173 ^oF)

Liquids - Vapor Pressure

Approximate vapor pressure for temperatures in the range 20 ^oC - 25 ^oC (68 ^oF - 77 ^oF).

Fluid Name	Vapor Pressure (kPa) Load Calculator!
Acetaldehyde	120
Acetic acid	2.1
Acetic acid anhydride	0.68
Acetone	30
Allyl alcohol	2.3
Allyl chloride	40
Aluminum nitrate, 10% solution in water	2.4
Aluminum sulphate, 10% solution in water	2.4
Amyl acetate	0.47
Aniline	0.09
Beer	2.4
Benzene	14
Benzyl alcohol	0.013
Bromine	28
Butyl acetate	1.5
Butyl alcohol, 1-butanol	0.93
Butyric acid n	0.43
Calcium chloride, 25% solution in water	2.4
Calcium chloride, 5% solution in water	2.4
Carbon disulphide	48
Carbon tetrachloride	15.3
Chloroform	26
Cyclohexanol	0.9
Cyclohexanone	0.67
Ethyl acetate	14
Ethyl alcohol	12.4
Ethyl glycol	0.7
Ethylene glycol	0.007
Formic acid	5.7
Furfurol, 2-Furaldehyde	0.3
Heptane	6
Hexane	17.6
Isopropyl alcohol (rubbing alcohol)	4.4
Kerosene	0.7
Methyl acetate	28.8
Methyl alcohol, methanol	16.9
Methylene chloride, dichloromethane	58
Milk	2.4
Nitrobenzene	0.03
Nonane	0.6
Octane	1.9
Pentane	58
Phenol	0.05
Propanol	2.8
Propionic acid	0.47
Sea water	2.4
Sodium chloride, 25% solution in water	2.4
Sodium hydroxide, 20% solution in water	2.4
Sodium hydroxide, 30% solution in water	2.4
Styrene	0.85
Tetrachloroethane	0.7
Tetrachloroethylene	2.5
Toluene	3.8
Trichloroethylene	9.2
Water	2.4

1 kPa = 10³ Pa = 0.145 psi

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Related Topics

Gases and Compressed Air - Air, LNG, LPG and other common gas properties, pipeline capacities, sizing of relief valves.
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Related Documents

Acetone - Thermophysical Properties - Chemical, physical and thermal properties of acetone, also called 2-propanone, dimethyl ketone and pyroacetic acid. Phase diagram included.
Benzene - Thermophysical properties - Chemical, physical and thermal properties of benzene, also called benzol. Phase diagram included.
Ethylene - Thermophysical Properties - Chemical, physical and thermal properties of ethylene, also called ethene, acetene and olefiant gas. Phase diagram included.
Moist Air - Vapor Pressure - Vapor pressures vs. dry and wet bulb temperatures in moist air.
Moist Air - Water Vapor and Saturation Pressure - Saturation pressure of water vapor in moist air vs. temperature.
Propane - Vapor Pressure vs. Temperature - Vapor pressure vs. temperature.
Propane Butane Mixture - Evaporation Pressure - Evaporation pressure of propane butane mixture vs. temperature.
Removing Heat with Air - Calculating heat removed with air by measuring the wet bulb temperature.
Saturated Steam - Properties for Pressure in Bar - Saturated Steam Table with properties like boiling point, specific volume, density, specific enthalpy, specific heat and latent heat of vaporization.
Water - Saturation Pressure and Specific Weight vs. Temperature - Vapor pressure and specific weight of water at temperatures ranging 32 to 212 ^oF - Imperial Units.
Water - Saturation Pressure vs. Temperature - Online calculator, figures and tables with water saturation (vapor) pressure at temperatures ranging 0 to 370 °C (32 to 700°F) - in Imperial and SI Units.
Water Boiling Points at Higher Pressures - Online calculator, figures and tables showing boiling points of water at pressures ranging from 14.7 to 3200 psia (1 to 220 bara). Temperature given as °C, °F, K and °R.

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