Question

I have a question that burning of candle is a chemical change or can we say that it is a physical change. Please explain it with example. ​

Answer 1

Answer:

When a candle burns, both physical and chemical changes occur.

Physical Changes: On heating, candle wax gets melted. Since it again turns into solid wax on cooling. So, the melting of wax and vapourisation of melted wax are physical changes.

Chemical Changes : The wax near flame burns and gives new substances like carbon dioxide, carbon soot, water vapour, heat and light.

EXAMPLE:

LPG is another example of a familiar process in which both the chemical and physical changes take place. LPG is present in liquid form in the cylinder. When it comes out of the cylinder, it converts into gaseous form which is a physical change. It undergoes chemical change when gas burns in air.

Explanation:

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Answer 2

Answer:

I am not sure but I think answer is both ( chemical and physical change)

Explanation:

because

Physical change : observed when candel melts as it is visible by naked eye and also it can be cooled and reshaped. and it turns out to be reversible process.so physical change is observed in a candle.

chemical change : observed when the wax melts near flame and converts wax vapour .

Note: chemical change can be seen through naked eye example burning of crackers.

hope it helps you