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The flash point of a material is the "lowest liquid temperature at which, under certain standardized conditions, a liquid gives off vapours in a quantity such as to be capable of forming an ignitable vapour/air mixture". [1] The flash point is sometimes confused with the autoignition temperature, the temperature that causes spontaneous ignition.
Oct 19, 2024 · Flash point, the lowest temperature at which a liquid (usually a petroleum product) will form a vapour in the air near its surface that will “flash,” or briefly ignite, on exposure to an open flame. The flash point is a general indication of the flammability or combustibility of a liquid.
- The Editors of Encyclopaedia Britannica
Boiling point and flash point are both important properties used to determine the volatility and flammability of substances. Boiling point refers to the temperature at which a liquid changes into a gas, while flash point is the lowest temperature at which a substance can ignite and produce a flammable vapor.
“Flash point” is the minimum temperature at which a liquid gives off vapor within a test vessel in sufficient concentration to form an ignitable mixture with the air near the surface of the liquid. The lower the flash point, the easier it is to ignite a liquid solvent.
The flash point of a product is the lowest temperature at which it emits sufficient vapors to form an ignitable mixture with air near its surface. In simpler terms, it is the temperature at which the product can catch fire if exposed to an open flame or spark.
A flammable liquid’s vapor pressure and volatility or rate of evaporation determine its ability to form an explosive mixture. These properties can be expressed by the flash point, which is the temperature to which a flammable liquid must be heated to produce a flash when a small flame is passed across the surface of the liquid.
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Jan 30, 2023 · In water, each hydrogen nucleus is bound to the central oxygen atom by a pair of electrons that are shared between them; chemists call this shared electron pair a covalent chemical bond. In H 2 O, only two of the six outer-shell electrons of oxygen are used for this purpose, leaving four electrons which are organized into two non-bonding pairs.
