If a burning candle is a chemical change
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When a candle burns, the oxygen in the air reacts and forms carbon dioxide. A new substance, the CO2 is formed. So it is a chemical change. When the candle melts, no new substance is formed and the molten wax can be again solidified and made into a candle and it is a reversible change.
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When a candle burns, the oxygen in the air reacts and forms carbon dioxide. So, when a new substance is form called carbon dioxide, it is a chemical change.
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