What organic matter cannot be burned? What substances can t be burned?

Organic matter can be burned.

Organic matter is the material basis for the production of life, and all living organisms contain organic compounds, such as fats, amino acids, proteins, sugars, heme, chlorophyll, enzymes, hormones, etc.

The metabolism of organisms and the genetic phenomena of organisms are involved in the transformation of organic compounds. In addition, many substances that are closely related to human life, such as oil, natural gas, cotton, dyes, chemical fibers, plastics, plexiglass, natural and synthetic drugs, etc., are closely related to organic compounds.

Some organic substances should not be ignited by fire (e.g., acetic acid), but they should be able to burn if they are properly used as catalysts. For example, sucrose is not lit, but if you sprinkle some soot on the sucrose, it may ignite the sucrose (this experiment can be done at home, sucrose cubes are best used), and the ash acts as a catalyst in the reaction. Such a complex high school stage should not be mastered.

If it is a problem of organic matter combustion (e.g., a comparison of the amount of oxygen consumed by combustion), it does not matter whether the given organic matter can be burned or not, as long as it is given, it can be burned.

Not all organic matter can be burned, for example, carbon tetrachloride cannot be burned anyway, so carbon tetrachloride can be used as a fire extinguishing agent. Generally, the method of judging whether a halogenated hydrocarbon can be burned is that if the number of hydrogen atoms in the halogenated hydrocarbon is greater than or equal to the number of halogen atoms, it can be burned, and the halogen atom becomes hydrogen halide. If the number of hydrogen atoms in the halogenated hydrocarbon is less than the number of halogen atoms, it cannot be burned.

Carbon tetrachloride, fluorochloroalkane, it seems that there is no more.

Carbon tetrachloride is a certain phenolic resin.

The universal rule is: in oxygen.

For elemental matter: alkali metals (lithium, sodium, potassium, rubidium, cesium, francium), alkaline earth metals (magnesium, calcium, strontium, barium), hydrogen, carbon can be burned (if the oxygen concentration is large, aluminum, zinc, etc. can also be burned).

For inorganic compounds (sodium chloride, calcium oxide, etc.): almost all are non-flammable, excluding a few compounds (e.g. azide, ammonium salt, can **).

For organic compounds (ethanol, methane, benzene, etc.): almost all are flammable, excluding a few compounds (tetrafluoroethylene, carbon tetrachloride, etc.) where hydrogen is completely replaced

Mixture: look at the proportion of combustible and non-combustible, if the proportion of combustibles is large, it is basically combustible (silk, cotton), and the proportion of non-combustibles is non-combustible (glass fiber blended fabric).

During combustion

Momentum, heat and mass are transferred between fuel, oxygen and combustion products, resulting in a complex structure of flames with multi-component concentration gradients and non-isothermal two-phase flows. These transfers within the flame are achieved by laminar molecular transfer or turbulent micromass transfer, while industrial combustion units are dominated by turbulent micromass transfer. Exploring the distribution of velocity, concentration, and temperature in the combustion chamber and their interaction is an important part of the study of the combustion process from the perspective of fluid mechanics.

Due to the complexity of the combustion process, experimental technology is the main means of combustion engineering.

The above content reference: Encyclopedia - Burning.

The universal rule is: in oxygen.

For elemental matter: alkali metals (lithium, sodium, potassium, rubidium, cesium, francium), alkaline earth metals (magnesium, calcium, strontium, barium), hydrogen, carbon can be burned (if the oxygen concentration is large, aluminum, zinc, etc. can also be burned).

For inorganic compounds (sodium chloride, calcium oxide, etc.): almost all are non-flammable, excluding a few compounds (e.g. azide, ammonium salt, can **).

For organic compounds (ethanol, methane, benzene, etc.): almost all are flammable, excluding a few compounds (tetrafluoroethylene, carbon tetrachloride, etc.) where hydrogen is completely replaced

Mixture: look at the proportion of combustible and non-combustible, if the proportion of combustibles is large, it is basically combustible (silk, cotton), and the proportion of non-combustibles is non-combustible (glass fiber blended fabric).

Most inorganic compounds cannot be burned, such as sodium chloride (table salt), water, etc., and some mixtures cannot be burned, such as glass, bricks, stones, asbestos, etc.

In general, polyhalogenated hydrocarbons are not flammable, so they can be used as flame retardants.

Polyhalogenated hydrocarbons are chemicals that are widely used as non-protic organic solvents. The hydrocarbon plum spike group containing aromatic rings is called polyhalogenated aromatic hydrocarbons; The hydrocarbon group that does not contain aromatic rings is called polyhalogenated aliphatic nahub hydrocarbon. Low-grade polyhaloalkanes are widely used aprotic organic solvents, such as dichloromethane and chloroform; In addition to being used as solvents, carbon tetrachloride and tetrabromoethane can also be used as fire extinguishing or flame retardants.

Some special polychlorinated alkanes are currently used as refrigerants in freezers such as refrigerators;

Among the polyhalogenated aromatic hydrocarbons, DDT is the most well-known for its use as an insecticide.