why do some substances burn without a flame
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The chemical process in which asubstance reacts with oxygen to give off heat is called combustion. ... The substanceswhich vaporize during burninggive flames. For example combustion of kerosene oil produces flame. On the other hand certain substances like coaldo not vaporize and hence doesn't produce a flame.
anjalitivari890:
Because their ignition point is very high .
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