Physics
Describe an experiment to show that air expands on heating.
Heat Energy
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Answer
The following experiment demonstrates that air expands on heating:
- Take an empty bottle. The empty bottle contains air.
- Attach a rubber balloon to its neck as shown in figure.
- The balloon is deflated initially.
- Place the bottle in a water bath containing boiling water. It heats the air present in bottle.
- After sometime it is noticed that the balloon gets inflated as shown in figure.
Conclusion — This shows that on heating, air present inside bottle expands and fills the balloon. So the balloon gets inflated. This shows that air expands on heating.
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