Question

“When a candle burns, both physical and chemical changes take place.” - Justify this

statement.
PLEASE GIVE THE ANSWER
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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

Answer 2

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When candle burn, both physical and chemical changes take place. Justify this.

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Physical Change :-

Yes, it is true that when a candle burns physical change take place.

Why? What it that?

The physical change is that when the candle burns, the wax also burns along with it. And the burning of wax in a candle is a physical change. This is because the melted wax can again be changed into solid form by the help of freezing process.

Chemical Change :-

Yes, it is true that when a candle burns along with physical a chemical change also takes place.

But what's that?

The chemical change is that when the candle burns, the flame of the candle also burns along with it. The wax near flame burns and gives new substances like carbon dioxide, carbon soot, water vapour, heat and light which can only be changed with the help of chemical methods.

General equation for chemical change is:-

Fuel + O2 → CO2 + H2O.

hope it helps.

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