Why burning of candle is a physical and chemical change?

Answer 1

CHEMICAL

Answer 2

New substances are being formed and old ones consumed, so this is a chemical change.

The melting of the candle wax is a physical change. The burning of the wick is a chemical change.
When a candle burns, both a physical and chemical change takes place. The melting of the wax is the physical change, whereas the chemical change is the combustion of the wax and the wick.

Answer 3

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

Answer 4

It is both. For the wick and some of the wax, it is a chemical change. They burn (oxidize) into carbon dioxide, water, and other compounds such as carbon monoxide.

For the rest of the wax, it is obviously a physical change. It melts and then become solid again as it cools. But there is less wax remaining than was present in the original candle. This wax was what provided the energy released by the candle.

Answer 5

It is a chemical change. Burning the candle wick converts it into CO2 and water when it reacts with the heat and oxygen in the air. The wax melting is a physical change.

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Phenomena during the candle burning:

- melting (physical phenomenon)

- evaporation (may be considered a chemical but also a physical phenomenon)

- oxidation - reaction with oxygen, burning (chemical phenomenon)

- thermal decomposition (chemical phenomenon)

Answer 6

Chemical change. The candle was and the wick are getting burned meaning that the solid is turning into a gas. Of course any chemical change means that the look of the mater will change. It is a a chemical change and not a physical change because you can't turn the carbon dioxide it created back to its original state.

Answer 7

this is because a candle lives some wax as the string wastes away, which means the left over wax can then be made into another candle, with a new string of course which makes candle burning a chemical and physical change.

Answer 8

Both.

The wax melts which is a physical change and then the carbon atoms in the wax combine with oxygen which is a chemical change.

Answer 9

Both, but the chemical change (burning) is paramount.

Answer 10

The 'melting' is physical, the 'burning' is chemical.