<P> In chemistry and physics, volatility is quantified by the tendency of a substance to vaporize . Volatility is directly related to a substance's vapor pressure . At a given temperature, a substance with higher vapor pressure vaporizes more readily than a substance with a lower vapor pressure . </P> <P> The term is primarily written to be applied to liquids; however, it may be used to describe the process of sublimation which is associated with solid substances, such as dry ice (solid carbon dioxide) and osmium tetroxide (OsO), which can change directly from the solid state to a vapor, without becoming liquid . </P>

How can you tell if a substance is volatile