Vapour PressureWhen a liquid is exposed to atmosphere molecules escape from its surface in a vapour form. Supposing the liquid is placed in a closed container, the activity continues so that vapour fills the space in between the liquid level and the container. A pressure develops and reaches an equilibrium. The vapour is said to be saturated. The pressure it exerts upon the liquid surface is the vapour pressure.
(c) Aerospace, Mechanical & Mechatronic Engg. 2005 University of Sydney |
