Vapor pressure is square related to the temperature of the liquid.

Vapor pressure is directly related to the temperature of the liquid.<br /><br />As the temperature of a liquid increases, the kinetic energy of its molecules also increases. This results in more molecules having enough energy to escape from the liquid phase into the vapor phase, thereby increasing the vapor pressure. Conversely, as the temperature decreases, the vapor pressure decreases because fewer molecules have sufficient energy to escape into the vapor phase.