The apparatus shown in the diagram was used to investigate the expansion and contraction of a gas - Junior Cycle Science - Question b - 2010
Question b
The apparatus shown in the diagram was used to investigate the expansion and contraction of a gas.
(i) What is observed when the flask is heated?
What?
Bubbles of... show full transcript
Worked Solution & Example Answer:The apparatus shown in the diagram was used to investigate the expansion and contraction of a gas - Junior Cycle Science - Question b - 2010
Step 1
What is observed when the flask is heated?
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Answer
When the flask is heated, bubbles of air are released, and the water level in the glass tube falls.
Step 2
Explain your observation when the flask is heated.
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Answer
The air inside the flask expands as it heats up, causing the pressure to increase. As a result, more air escapes, leading to the observed fall in the water level.
Step 3
What is observed when the flask is allowed to cool?
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Answer
As the flask cools, the water rises up the glass tube, and the bubbles stop forming.
Step 4
Explain what you observe as the flask cools.
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Answer
As the flask cools, the air contracts, leading to a decrease in pressure inside the flask. This lower pressure allows the water to rise up into the flask, creating a partial vacuum.
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