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Jassimrat Kaur from Budha Dal Public School, asked a question
Subject: Science , asked on 28/9/11

Burning of candle is physical change or chemical change

EXPERT ANSWER

prerna.bansal... , Meritnation Expert added an answer, on 29/9/11
Hi,
 
Burning of candle is both physical and chemical change. Burning of candle melts the wax and hence physical state of wax has changed from solid to liquid. Again the wax combines with the atmosphere oxygen and changes to carbon dioxide, heat and light.
Thus both the changes are accompanied in the burning of candle.
 

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vaibhav.vaibhav011... , added an answer, on 28/9/11
1 helpful votes in Science

chemcial change

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Nandhiga Ramani From Psbb Millenium School, added an answer, on 30/9/11
137 helpful votes in Science

Hi!

As all told it is both physical and chemical change.

Cheers!

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Angel Sharma From Hanuman Prasad Dhanuka Saraswati, added an answer, on 28/9/11
232 helpful votes in Science

 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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Bebo Miracle From Delhi Public School, added an answer, on 28/9/11
16 helpful votes in Science

 it is both chemical as well as physical change as

  • burning is a chemical change always
  • change in the state of wax is a physical change...

thumbzz up plzzz

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thecoolhermoinie From Srv , added an answer, on 28/9/11
101 helpful votes in Science

The physical changes in the candle is that the wax melts, then freezes back into solid state again, and the chemical changes are that the wick burns, soot, and smoke. water vapor and carbon dioxide are formed. and When the wax burns, and the wax combines with the oxygen to form CO2, carbon monoxide, carbon particles (incomplete burning/oxidation) and water. After it burns, you can 't get the wax back.

hence it is both physical and a chemical change
 

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Mukesh Kumar Roy From Delhi Public School, added an answer, on 28/9/11
1 helpful votes in Science

As we know
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

So burning of candle is 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.
And 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.

In other way : you can say 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.

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Sakshi Ragit From Stella Maris School, added an answer, on 28/9/11
2 helpful votes in Science

it is physical change. because after the candle is burnt new material is not formed

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