Question

What do you mean by spontaneous combustion?

Answer 1

Spontaneous combustion is a type of combustion which occurs by self heating (increase in temperature due to exothermic internal reaction), followed by thermal runway (self heating with rapidly accelerates to high temperatures) and finally autoignition.

Answer 2

Spontaneous combustion means when a substance burn even at room temperature.
Eg:The phosphorus burns or magnesium ribbon at the room temperature.
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