What determines the temperature at which a fumigant changes from liquid or solid to gas?

The temperature at which a fumigant changes from liquid or solid to gas is primarily determined by the boiling point of the fumigant. The boiling point is a specific physical property of a chemical, indicating the temperature at which the vapor pressure of the liquid equals the external pressure surrounding the liquid. When the fumigant reaches its boiling point, it undergoes a phase change from liquid (or solid) to gas.

Understanding the boiling point is essential in fumigation practices as it dictates how and when the fumigant can be effectively applied. Higher boiling points typically require more energy (in the form of heat) to vaporize, which can influence the application method and the conditions needed to achieve proper gas concentration within the fumigation environment. Recognizing the boiling point also helps fumigation professionals ensure safety and effectiveness by allowing them to manage temperature conditions accordingly.