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Describe an experiment to demonstrate thermal expansion in gases. - Physics

Short Note
Describe an experiment to demonstrate thermal expansion in gases.
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Solution

Take a round bottom flask which is filled with air and closed with a one holed rubber cork. A narrow capillary tube is passed through the cork and the flask is supported on a tripod in an inverted position as shown in the figure, so that the end of the capillary tube is underwater. Now, heat the flask gently with a spirit lamp. You will observe bubbles coming out from the capillary tube. This shows that gases expand on heating.

Concept: Graphs Showing Variation of Volume and Density of Water with Temperature in the 0 to 10°C Range
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APPEARS IN

Frank Class 9 Physics ICSE
Chapter 5 Heat
Thermal Expansion | Q 17 | Page 203
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