Vapor pressure
Vapor pressure is the pressure applied by a vapor in thermodynamic equilibrium with its condensed phases at a given temperature in a closed system. The vapor pressure shows how fast a liquid evaporates. A substance with a high vapor pressure at normal temperatures is often called a volatile. As the temperature of a liquid increases, the kinetic energy of its molecules also increases. As the kinetic energy of the molecules increases, the number of molecules changing into a vapor also increases, so it increases the vapor pressure.
Vapor Pressure Media
The microscopic process of evaporation and condensation at the liquid surface.
If vapor pressure exceeds the thermodynamic equilibrium value, condensation occurs in presence of nucleation sites. This principle is indigenous in cloud chambers, where ionized particles form condensation tracks when passing through.
The pistol test tube experiment. The tube contains alcohol and is closed with a piece of cork. By heating the alcohol, the vapors fill in the space, increasing the pressure in the tube to the point of the cork popping out.
A log-lin vapor pressure chart for various liquids
Vapor pressure of liquid and solid benzene
