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Let us summarize the happenings. 

The candle 1 continues to bum, unless it is blown – off by strong moving air or any other external force. This is because fresh air is continuously available to the candle for its burning process.

Candle 2 glows for a while and then gets put – off. When the burning candle is covered with a glass tumbler, the candle can use the oxygen available in the air inside the glass tumbler. Since only a small amount of air is present inside the glass tumbler – only a small portion of oxygen is available for the candle to continue glowing. When all the oxygen of the air inside the gas jar is used up, then the burning candle gets extinguished.

Now, repeat the candle – glowing experiment taking four containers of different sizes. Lor example, you can take a 250ml conical flask, a 500ml bottle, a one – litre jar, a two – litre jar. Cover the burning candle one by one with these containers and find out how long it takes for the candle to extinguish in each case. Record your observations in the following table.

1 Answer

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S.No. Volume of the Container (ml) Time taken for candle to extinguish (second)
1. 250 6 seconds
2. 500 12 seconds
3. 1000 24 seconds
4. 2000 48 seconds

The time taken for the candle to extinguish depends upon the volume of the containers. Lor less volume, the time taken is less. Lor more volume, the time taken is more.

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