A Steam pressure of a liquid is defined as the pressure exerted by molecules escaping from the liquid to form a separate vapor phase above the surface of the liquid.
The pressure exerted by the vapor phase is called the
- vapor pressure or saturation
Vapor pressure or saturation depends on temperature.
If a fluid consists of more than one component (a solution), components with
- higher vapor pressure are called of light components
- lower vapor pressure are called of heavy components
Temperature and vapor pressure or saturation for some common fluids
At the saturation temperature of atmospheric pressure of
- Water: 100 O C (212 O F)
- ethyl alcohol: 78,5 O C (173 O F)
Liquids - Steam Pressure
Approximate vapor pressure for temperatures in the range of 20 O C – 25 O C (68 O F – 77 O F).
|
fluid name
|
Steam pressure
(kPa) |
|---|---|
| Acetaldeído | 120 |
| Amyl acetate | 0,47 |
| Acetate of butilo | 1,5 |
| Acetone | 30 |
| acetic acid anhydride | 0,68 |
| Aniline | 0,09 |
| Benzene | 14 |
| Bromo | 28 |
| Calcium chloride, 5% solution in water | 2.4 |
| Calcium chloride, 25% solution in water | 2.4 |
| carbon disulfide | 48 |
| Carbon tetrachloride | 15,3 |
| Beer | 2.4 |
| Chloroform | 26 |
| allyl chloride | 40 |
| Ciclohexanol | 0,9 |
| Cyclohexanone | 0,67 |
| ethyl acetate | 14 |
| Ethyl alcohol | 12,4 |
| ethylglycol | 0,7 |
| Ethylene glycol | 0,007 |
| Formic acid | 5.7 |
| Furfurol, 2-furaldehyde | 0,3 |
| Heptane | 6 |
| Hexane | 17,6 |
| Isopropyl alcohol (isopropyl alcohol) | 4.4 |
| Kerosene | 0,7 |
| Methyl acetate | 28,8 |
| Methyl alcohol, methanol | 16,9 |
| Chloride of methylene, dichloromethane | 58 |
| Milk | 2.4 |
| Aluminum nitrate, 10% solution in water | 2.4 |
| Nitrobenzeno | 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 |
| Aluminum sulfate, 10% solution in water | 2.4 |
| Tetracloroetano | 0,7 |
| Tetracloroetileno | 2,5 |
| Toluene | 3.8 |
| Tricloroetileno | 9.2 |
| Water | 2.4 |
| Acetic acid | 2.1 |
| butyric acid | 48 |
| allyl alcohol | 2.3 |
| Benzilic alcohol | 0,013 |
| Butyl alcohol, 1-butanol | 0,93 |
- 1 kPa = 10 3 Pa = 0.145 psi
Source: https://www.engineeringtoolbox.com/vapor-pressure-d_312.html
