Question

What is the difference between rapid combustion , spontaneous combustion and explosion?

Answer 1

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. I