Take a glass jar and place a candle in the middle of the jar. light the candle and put some water in galss jar making sure the water level does not reach the candle wick. put an inverted glass on burning candle. Record your observations and give reasoning for your observations
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What happens if you cover a lit candle in a water basin with a glass? The glass becomes foggy on the inside and the flame fades and eventually goes out. Then the water level in the glass rises. The burning candle produces carbon dioxide and water in the form of water vapor.
Explanation:
Additional information: On heating, candle wax melts and forms liquid wax. So, it is a physical change in the burning of candles. Since, it again turns into solid wax on cooling. This is a reversible change.
Therefore, the jar contain- ing exhaled air will contain less oxygen and hence the candle burns for a shorter period of time (in addition, carbon dioxide is heavier than oxygen and so will displace oxygen from the bottom of the jar).
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