Candle Flame Combustion Explained
Combustion, the process of burning, requires fuel (wax vapor) and an oxidizer. For a candle flame, the oxidizer is oxygen from the air.
When a burning candle is covered with a glass jar:
- The glass jar encloses a finite amount of air.
- The candle flame consumes the oxygen (O<0xE2><0x82><0x82>) present inside the jar.
- As oxygen levels decrease, the combustion process weakens.
Once the available oxygen is depleted below the level required to sustain the flame, the candle will stop burning.
Therefore, covering a burning candle with a glass jar causes the flame to extinguish due to lack of oxygen.
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Among the following, the conducting form of carbon is
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