Question

Describe an experiment to show that air expands on heating.

Answer 1

Experimental set up:



Procedure:

1. Take a glass flask and close its mouth with a cork having a capillary tube containing indicator visible in the tube.
2. Keep it airtight.
3. Now place the flask in hot water.

Observation:

1. We will observe that the indicator in the tube will go up.
2. This happens because air inside the flask expands with rise in temperature.
3. This shows that air expands on heating.