Why Does Water Rise in a Test Tube When a Candle Burns?

AI Thread Summary
When a test tube is placed over a burning candle in a petri dish with water, the candle extinguishes due to the depletion of oxygen. The combustion process consumes oxygen and produces carbon dioxide, which dissolves in the water, leading to a decrease in gas volume inside the test tube. This reduction in gas volume creates a drop in pressure, causing the water from the dish to rise into the test tube. The relationship between temperature and pressure plays a role, as the system's closure leads to changes in pressure dynamics when the candle burns out. Overall, the rise of water is primarily attributed to the consumption of oxygen and the resulting decrease in gas volume and pressure.
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Why is it that when you place a test tube over a burning candle in a peatree dish with water, that the candle goes out and then the water from the dish rises into the test tube. Mainly what are the reasons that the water rises. I am kind of going with the "temperature and pressure are related" idea but I am not quite sure if that is right. Thanks for the help!
 
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My guess is that by closing up the system, the temperature increases, compensated by the dramatic decrease in volume.
 
Candle uses all oxygen and goes off. Produced carbon dioxide solves in water and that's why gas volume in the test tube decreases - and water goes up.
 
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