If an inverted glass jar is put over a burning candle, resting in a shallow bowl of water, the candle?
If an inverted glass jar is put over a burning candle, resting in a shallow bowl of water, the candle burns for a few seconds longer and then goes ou...
If an inverted glass jar is put over a burning candle, resting in a shallow bowl of water, the candle
burns for a few seconds longer and then goes out. Explain what happens to the water level inside
the jar, together with the reasons for this behaviour.
You have basically described the Bell-Jar experiment used to prove the existence of Oxygen being required for combustion and that it occupies approximately 20% by volume of the atmosphere at sea level.The water level rises because the Oxygen combines with the carbon to from CO2, and hence a partial vacuum is created inside the jar to the extent of the space occupied and the pressure exerted by the oxygen.
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the water level rises
the candle uses the oxygen which creates a vacuum in the jar