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A. Burning a piece of paper is technically called combustion. It represents a chemical reaction whereby the carbon compounds in the paper are oxidized into different chemicals like carbon dioxide and water vapor. This is a chemical change.
1 The process of burning (as opposed to evaporating) is a chemical reaction, a chemical change. 2  The wax molecules are undergoing a chemical change; they are changing into different molecules by reacting with a substance in the air. The process of burning (as opposed to evaporating) is a chemical reaction, a chemical change. 2  The wax molecules are undergoing a chemical change; they are changing into different molecules by reacting with a substance in the air.