wax is melted over a flame and then catches fire and burns. what kind of change physical or chemical?
Answers
Answer:
Physical changes in burning candle On heating, candle's wax melts, it is a physical change. Since, it again turns into solid wax on cooling. The change is reversible. Chemical changes in burning candle The wax near to flame burns and gives new substances like carbon dioxide, carbon soot, water vapours, heat and light.
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Answer:
Once the liquid wax gets hot enough, it then turns from a liquid into a gas. The hot gas then reacts with the oxygen from the air and is burned, creating the candle flame that we see. ... As the heat of the wax vapor flame melts more of the solid wax it creates more fuel for the flame to burn.
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
