Vapor Pressure of Common Alkanes
The vapor pressure of alkanes refers to the pressure exerted by the vapor (gaseous phase) of a particular alkane at equilibrium with its liquid phase at a given temperature.
The following table provides a curated list of vapor pressure values for different alkanes at 1 atmospheric (atm) pressure. (1 atm = 101,325 Pa)
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| Temperature | ||
|---|---|---|
| Methane (CH4) | 25 | 6.21×104 |
| Ethane (C2H6) | 20 | 3850 |
| Propane (C3H8) | 20 | 840 |
| Butane (C4H10) | 25 | 243 |
| Pentane (C5H12) | 20 | 56.6 |
| Hexane (C6H14) | 20 | 16.2 |
| Heptane (C7H16) | 20 | 4.7 |
| Octane (C8H18) | 20 | 1.4 |
| Nonane (C9H20) | 25 | 0.59 |
| Decane (C10H22) | 25 | 0.17 |
| Undecane (C11H24) | 25 | 0.055 |
| Dodecane (C12H26) | 25 | 0.018 |
| Tridecane (C13H28) | 25 | 0.007 |
| Tetradecane (C14H30) | 25 | 0.002 |
| Pentadecane (C15H32) | 25 | 3.56×10-4 |
| Hexadecane (C16H34) | 25 | 1.99×10-4 |
| Heptadecane (C17H36) | 25 | 3.04×10-5 |
| Octadecane (C18H38) | 25 | 4.55×10-5 |
| Nonadecane (C19H40) | 25 | 6.53×10-6 |
| Eicosane (C20H42) | 25 | 6.16×10-7 |
| Heneicosane (C21H44) | 25 | 1.16×10-5 |
| Docosane (C22H46) | 25 | 1.71×10-7 |
| Tricosane (C23H48) | 25 | 2.32×10-6 |
| Tetracosane (C24H50) | 25 | 5.43×10-7 |
| Pentacosane (C25H52) | 25 | 2.01×10-7 |
| Hexacosane (C26H54) | 125 | 0.001 |
| Heptacosane (C27H56) | 25 | 3.73×10-10 |
| Nonacosane (C29H60) | 148 | 0.001 |
| Triacontane (C30H62) | 25 | 3.64×10-12 |
| Hentriacontane (C31H64) | 25 | 1.87×10-12 |
| Tritriacontane (C33H68) | 25 | 5.36×10-12 |
Related Tables
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) Yaws, Carl L. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. Netherlands: Elsevier Science, 2015. 4) Occupational Safety and Health Administration (OSHA): The National Institute for Occupational Safety and Health (NIOSH).