Nesteitäkaasuja

Nesteitäkaasuja, a Finnish term, translates to "liquefied gases" in English. This category encompasses substances that are gases at standard atmospheric pressure and temperature but are stored or transported in a liquid state. Liquefaction is achieved by reducing the temperature or increasing the pressure of the gas, or a combination of both. This process significantly reduces the volume of the substance, making it more economical and practical for storage and transportation.

Common examples of liquefied gases include liquefied petroleum gas (LPG), which is primarily propane and butane, and liquefied natural gas (LNG), composed mainly of methane. Refrigerants, industrial gases like oxygen and nitrogen, and even some fuels like hydrogen are also often handled in liquefied form. The properties of a liquefied gas depend on its chemical composition. When the pressure is released or the temperature rises, the liquid rapidly vaporizes back into its gaseous state. This phase transition is critical for their applications, such as in heating, cooking, welding, and as refrigerants in cooling systems. Safety precautions are paramount when handling liquefied gases due to their potential flammability, extreme cold temperatures (in the case of cryogenic liquids), and the rapid expansion that occurs upon vaporization.