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Fire. A burning candle. Fire is the rapid oxidation of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction products. [ 1][ a] At a certain point in the combustion reaction, called the ignition point, flames are produced. The flame is the visible portion of the fire.
Flames of charcoal. A flame (from Latin flamma) is the visible, gaseous part of a fire. It is caused by a highly exothermic chemical reaction made in a thin zone. [ 1] When flames are hot enough to have ionized gaseous components of sufficient density, they are then considered plasma. [vague][ 2]
Combustibility and flammability. A combustible material is a material that can burn (i.e., sustain a flame) in air under certain conditions. A material is flammable if it ignites easily at ambient temperatures. In other words, a combustible material ignites with some effort and a flammable material catches fire immediately on exposure to flame.
The symbol of fire was a cue pointing towards transformation, the chemical variant being the symbol delta, which is also the classical symbol for fire. [16] Conversion symbolized can be good, for example, refining raw crudities to gold, as seen in The Devil .
Fire extinguisher. A stored-pressure fire extinguisher. A fire extinguisher is a handheld active fire protection device usually filled with a dry or wet chemical used to extinguish or control small fires, often in emergencies. It is not intended for use on an out-of-control fire, such as one which has reached the ceiling, endangers the user (i ...
A chemical property is any of a material's properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity. [ 1] Simply speaking, chemical properties cannot be determined just by viewing or touching the substance; the substance's internal ...
Smoke is a suspension [ 3] of airborne particulates and gases [ 4] emitted when a material undergoes combustion or pyrolysis, together with the quantity of air that is entrained or otherwise mixed into the mass. It is commonly an unwanted by-product of fires (including stoves, candles, internal combustion engines, oil lamps, and fireplaces ...
Acetone ( 2-propanone or dimethyl ketone) is an organic compound with the formula (CH3)2CO. [ 22] It is the simplest and smallest ketone ( >C=O ). It is a colorless, highly volatile, and flammable liquid with a characteristic pungent odour, very reminiscent of the smell of pear drops .