Why do solid substances also have a flash point?
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Why do solid substances also have a flash point?
See the definition of flash point: The flash point is the lowest temperature at which, in a stable air environment, the vapor generated from the surface of a flammable liquid or solid catches fire when exposed to a test flame. The flash point is the lowest temperature at which a flammable liquid or solid can release enough vapor to form a flammable mixture with air at the surface of the liquid or solid within its container.
Solids can also sublimate and evaporate
The flash point is the lowest temperature at which a mixture formed by the vapors emitted from flammable and combustible liquids and air can catch fire when exposed to an ignition source. A small amount of solid that can sublimate also has a flash point. Such as tea, paraffin, camphor, etc.
That’s correct; flash point is not exclusive to flammable liquids. From the perspective of fire classification, Class B fires include those involving meltable solids.
Some solids can sublime, and all of them have a flash point as well
Solids have a gas-solid equilibrium, while liquids have a gas-liquid equilibrium