Question

Explain how the water in the Flask changes to gas

Answer 1

Explanation:

When the water vapor cools enough, the attractions between the molecules bring them together. This causes the water vapor to change state and become tiny drops of liquid water. The process of changing from a gas to a liquid is called condensation.

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Answer 2

Answer:

Heating up the flask makes it's enclosed air to expand. The air expansion pushes the cylinder inside the glass tube towards the tube's open end . the tube is graduated and can measure the change in gas volume due to a known change in temperature.