why is melting of candle a physical change and burning of candle wick is a chemical change
Dear student,
Melting of candle is a physical and reversible change because on heating it melts but it becomes wax again when it is cooled. But during the burning of candle wick the wax near the wick melts and converted into liquid wax. This liquid wax vaporises due to heat and also produces carbon dioxide, smoke, heat, light. since new products are formed in this case, buring of candle wick is a chemical change.
Regards
Melting of candle is a physical and reversible change because on heating it melts but it becomes wax again when it is cooled. But during the burning of candle wick the wax near the wick melts and converted into liquid wax. This liquid wax vaporises due to heat and also produces carbon dioxide, smoke, heat, light. since new products are formed in this case, buring of candle wick is a chemical change.
Regards
