how is burning of candle is a physical change as well as a chemical change
Answers
Answer:
Explanation:
Burning of candle is both a physical as well as chemical change. Chemical because the wick is burned, which is a combustion reaction, and physical because the melting of the was is a physical change.
The melting of the wax is a physical change because you're just changing the form of the wax, not it's chemical properties. When you melt wax and it hardens, it's still wax, just in a different shape.
Burning is a chemical change. In a chemical change, new substances are formed - carbon dioxide and water. Melting wax is a physical change.
The melting of the candle wax is a physical change. The burning of the wick is a chemical change.
Burning a candle involves both physical and chemical changes.
The wick is burnt, so by definition involves a chemical change. Specifically, this is the reaction of the fibre and oxygen in the air forming carbon oxides and water.
The physical changes are the wax being melted and some of it vapourised; the same chemical change as above also takes place, as some of this vapour is burnt along with the wick.
New answer: the wax has to be vapourised in order to react with oxygen. The wick is just there to soak up the melting wax and lift it up to reach the oxygen. The flame is above the top of the candle: the vapourised wax is what is burning.
Chemical Change- is when something can not be changed back to its normal self
Physical Change- is when it can turn back in to its normal self
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Explanation:
No new substances are formed. In aburning candle, there are both physicaland chemical changes. The melting of the solid wax to form liquid wax and the evaporation of liquid wax to form wax vapour are physical changes. Theburning of the wax vapour is a chemical change.