Answer:

That's not burning of chemical change

Some require ignition temperature to burn

Some reaction are endothermic so they need to absorb energy to react

That's why some reaction require heat energy

Explanation:

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Explanation:

Application of heat to certain substances causes only physical changes in which no new substance or substances are formed. Application of heat to some substances causes chemical changes, or chemical reactions, in which one or more new substances are formed, with different properties from the original.