Types of Combustion

TYPES OF COMBUSTION

1. Rapid Combustion
In this combustion, the substances burns rapidly and produces light and heat. Gas burns quickly producing heat and light in the process. E.g. LPG. Example: Bring a burning matchstick near a gas stove in the kitchen. Turn on   the knob of the gas stove. We find that the gas burns rapidly.

2. Spontaneous Combustion
In this type of combustion, substances burst out into flames suddenly without any known reason. Combustion in which a material bursts into flames suddenly without applying heat. E.g. Phosphorus which burns at room temperature. Spontaneous combustion of coal dust often causes accidental fires in coal mines. Heat from the sun or lighting may also cause spontaneous forest fires. Examples: Many disastrous fires in coal mines result due to this kind of combustion. The heat rays coming from the sun or a lightning strike might be responsible for this kind of combustion.

3. Explosion
In this type of combustion, all of a sudden reaction results into heat, light and sound. Moreover, large amount of gas gets released. When a material bursts suddenly to produce heat, light and sound on the application of heat or pressure, it is called an explosion. E.g. Crackers and fireworks which release a large amount of gas too. Example: When a fire cracker is ignited, a sudden reaction takes place with the evolution of heat, light and sound with the large amount of gas.