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How Would You Demonstrate to a Friend That Gases Expands When Heated ?
(i) Take an empty bottle. The empty bottle contains air. Attach a rubber balloon to its neck as shown in Figure. Initially, the balloon is deflated.
(ii) Place the bottle in a vessel containing water. Heat the vessel till water starts boiling. After some time you will notice that the balloon gets inflated. The reason is that the air inside the bottle expands on heating and it fills the balloon.
(iii) Take the bottle out of the water and then 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 the balloon passes to the bottle, so the balloon gets deflated.
Updated on: 10-Oct-2022
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