Question

why burning of fuel is a chemical change give five reasons to support your answer

Answer 1

1.  new substances such as carbon dioxide and water form when we are burning coal. Due to formation of new substances, burning coal is classified as a chemical change.

2. the heat spreading out comes just from the molecules structure change. This kind of energy is kind of reaction energy.

3. The Fire which produces light as a form energy.

4.An irreversible process as it is not a physical change.
hence , it is a chemical change
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Answer 2

because it cannot be reversed

it is permanent

It is usually accompanied by release or absorption of heat or light

a new substance is formed