Question

We get wax after burning candles but not in same volume why?how is it different from burning paper?

Answer 1

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$\sf{\underline{1)\:Burning\:of\:candle:}}$


There are two types of changes which occur when the candle burns.


They are:

=> $\sf{\underline{Chemical\:change}}$

=> $\sf{\underline{Physical\:change}}$


The burning of a candle is a chemical change.


⚫Because, it produces smoke also some wax burns which makes gases.


The melting of the candle is a physical change.


⚫Because, when the candle burns some wax melts down and it is in its wax form only.



$\sf{\underline{2)\:Burning\:of\:paper:}}$


Burning a piece of paper is technically called combustion.

It represents a chemical reaction.


The carbon compounds in the paper are oxidized into different chemicals like:


=> $\sf{\underline{Carbon\:dioxide}}$

=> $\sf{\underline{Water\:vapour}}$

This is a chemical change.


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