vapour pressure
Noun
Meaning
vapour pressure (plural vapour pressures)
(Britain) Alternative spelling of vapor pressure
Hypernyms
Examples
At this pressure, water boils at convert (described in vapour pressure of water article).
Refractory metals such as tungsten and rhenium do not emerge from the target even at high temperatures due to their low vapour pressure.
The answer is simple: most species have a negligible vapour pressure at such low temperatures and this means that they quickly condense on the sides of the apparatus.
The system is usually baked, preferably under vacuum, to temporarily raise the vapour pressure of all outgassing materials in the system and boil them off.