Answer the following question with the help of given statement:
When water is heated up to a certain temperature, it expands and when cooled
it contracts.
1. What term is used to describe such behaviour of water?
2. What happens when water is cooled at room temperature?
3. What happens when water is heated?
Answers
Answer:
1) anamolous behaviour of water
2) it's doesn't change
3) it forms water vapour
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Answer:
1. The anomalous expansion of water is an abnormal property of water whereby it expands instead of contracting when the temperature goes from 4o C to 0o C, and it becomes less dense. ... The density becomes less and less as it freezes because molecules of water normally form open crystal structures when in solid form.
2. Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. Hot water is less dense and will float on room-temperature water. Cold water is more dense and will sink in room-temperature water.
Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. Hot water is less dense and will float on room-temperature water. Cold water is more dense and will sink in room-temperature water.
3. When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapour.
Explanation:
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