põlemistemperatuuri

Põlemistemperatuur, also known as ignition temperature or autoignition temperature, is the lowest temperature at which a substance will spontaneously ignite in a normal atmosphere without an external source of ignition, such as a flame or spark. This temperature is a critical property for understanding fire hazards and for designing safe handling and storage procedures for flammable materials. Different substances have vastly different põlemistemperatuuri values. For example, wood typically ignites at temperatures around 300°C (572°F), while gasoline can ignite at around 280°C (536°F). Some gases, like hydrogen, have very low autoignition temperatures, making them highly flammable. Factors such as pressure, oxygen concentration, and the presence of catalytic surfaces can influence the põlemistemperatuur of a substance. It is important to distinguish põlemistemperatuur from flash point, which is the lowest temperature at which a liquid gives off enough vapor to form an ignitable mixture with air near its surface. A substance's põlemistemperatuur is generally higher than its flash point. Understanding and controlling conditions to remain below the põlemistemperatuur is a fundamental principle in fire prevention and safety engineering.