The principle of burning handkerchief

Because gas, liquid and solid combustible coexist with air, when it reaches a certain temperature, it will burn itself when it comes into contact with fire source. After the fire source is removed, the lowest temperature that can continue to burn becomes the ignition point or ignition point of the substance.

The specific heat capacity of water is large, water absorbs heat, and evaporation absorbs heat more, which can not reach the ignition point of handkerchief. The handkerchief was soaked in alcohol and then lit. Spontaneous combustion refers to the phenomenon that combustible substances burn in the air by self-heating or external heating without the action of external fire source. Under the specified conditions, the spontaneous combustion temperature of combustible materials at the lowest ignition temperature can be reached without any auxiliary ignition energy.

There is usually an inverse relationship between the ignition energy or temperature listed here and the exposure time required for ignition. Strong ignition energy can be ignited quickly, and weak ignition sources need longer exposure time. Strong ignition sources can also directly cause deflagration.

Extended data:

First, the experimental process of incombustible handkerchief

1. Mix two parts of alcohol and one part of water, and soak the handkerchief in the alcohol mixed with water.

Take the handkerchief out of the cup, wring the water a little, and then hang it on the wire.

3. Light the handkerchief with a match, and the burnt handkerchief is intact.

Second, the fire point

Ignition point refers to the process that substances that can undergo exothermic reactions reach a rapid combustion state.

Gas, liquid and solid combustible coexist with air. When it reaches a certain temperature, it will spontaneously ignite when it comes into contact with a fire source. After the fire source is removed, the lowest temperature at which the fire can continue to burn is called the ignition point or ignition point of the substance.

Small ignition sources (such as moderate electric spark discharge) that expose combustible materials to hot surfaces, heating wires and radiant energy may cause fires.

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