A flask of warm air with a tube connected to it was heated gently - Junior Cycle Science - Question (a) - 2017
Question (a)
A flask of warm air with a tube connected to it was heated gently.
The top of the tube was then placed under water, as shown.
(i) What is observed as the air co... show full transcript
Worked Solution & Example Answer:A flask of warm air with a tube connected to it was heated gently - Junior Cycle Science - Question (a) - 2017
Step 1
What is observed as the air cools?
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Answer
As the air in the flask cools, the water rises up the tube. This happens because the warmer air, when heating the flask, is now being replaced by cooler water from the surrounding environment.
Step 2
Explain this observation.
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Answer
The cooling of the air causes the gas to contract. As the air inside the flask cools, it occupies less volume, leading to a partial vacuum being created. This pressure difference causes water to be sucked up into the tube.
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