What changes you notice when you burn candle ? Discuss the reason of the shortening of candle .
Dear student,
Please find below the solution to the asked query
Please find below the solution to the asked query
Burning of candle involves both physical change and chemical change. Candle is made up of a solid block of wax with a wick embedded in it.
1) Physical Change
When candle is lit, the heat of the flame melts the solid wax to liquid wax. This signifies a physical change from solid state to liquid state.
2) Chemical Change
The wax acts as a fuel when we light the candle and is basically a chemical substance called carbon. The carbon combines with oxygen to form another chemical substance called carbon dioxide. Also the unburnt carbon is deposited as black substance called soot. This signifies a chemical change.
Constant melting of wax results in shortening of candle.
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