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8. Take round bottomed flask filled with water. Close its mouth with air-tight cork having delivery tube through it. ... As water gets heated in flask, the level of water in the tube rises from A to B. This proves that liquids expand on heating.
9.All states of matter expand when heated and contract when cooled. Gases expand most when heated and solids the least because gas particles are already far apart and are much freer to move.
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8th Answer:
1.Take an empty bottle.Actually the empty bottle contains air.Attach a rubber balloon to its neck as shown in figure.Initially,the balloon is deflated.
2.Place the bottle in a water bath containing boiling water.After some time you will notice that the balloon gets inflated as shown in figure.The reason is that the air inside the bottle expands on heating and it fills the balloon.
3.Take the bottle out of the water bath and 7 allow it to cool by itself.We will notice that the balloon gets deflated and it collapses. This is because the air inside the balloon and the bottle,has contracted on cooling. The air from balloon passes to the bottle, so the balloon gets deflated.
9th Answer:
Gases expand much more than the liquids and the solids.Like liquids,the gases do not have definite shape,so they also have only the cubical expansion.
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