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difference between rapid combustion , spontaneous combustion and explosion

 In rapid combustion, a substance burns rapidly producing heat and light.

For example: a matchstick burns rapidly on being struck against the sides of a matchbox.
 
Spontaneous combustion is a type of combustion which occurs without an external ignition source. It is usually a slow process that can take several hours of decomposition/oxidation with heat building up to a point of ignition.
 
An explosion is a rapid increase in volume and release of energy in an extreme manner, usually with the generation of high temperatures and the release of gases. An explosion creates a shock wave. If the shock wave is a supersonic detonation, then the source of the blast is called a "high explosive". Subsonic shock waves are created by low explosivesthrough the slower burning process known as deflagration.
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bakwaas ans

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 rapid combustion             /                    

type of combustion in which            

a fuel burns rapidly to produce

more heat and light

eg- burning of gas                                        

                                           /

                                         /

                                       /

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Rapid combustion :
                               1. It is to be initiated once.
                               2. External heat is required to start it once.
                               3. Large amount of heat and light is evolved.
Spontaneous combustion :
                                         1. It takes place by itself.
                                         2. No external heat is required to start it.
                                        3. Small amount of heat and light is evolved
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when the gas burns rapidly and produces heat and light such combustion is called rapid combustion. There are some substances like phosphorus which burn in air at room temperature this is called spontaneous combustion. the evolutionof heat, light and sound. a large amount of gas formed in the reaction is liberated.Such a reaction is called explosion.
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Ooook
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differentiate between rapid and spontaneous combustion
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SPONTANEOUS COMBUSTION occurs on its own without the help of any external heat.
eg.  Forest Fire
RAPID COMBUSTION occurs wen a large amount of heat and light is produced in a short time.
eg.  Burning of Paper
EXPLOSION occurs when a large amount of heat, light and sound is generated.
eg. Burning of Sulphur



 
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rapid combustion is something which burns rapidly
spontaneous combustion is something which burns automatically
explosion is those which produce heat, light and sound when burnt.
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Difference between rapid combustion
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kblv
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