Question
Sat April 04, 2015 By: Vijay_236_237 Prasad

Describe an experiment to show that a gas expands on being heated and contracts on cooling.

Expert Reply
Vaibhav Chavan
Mon April 06, 2015
  • Take an empty flask and clamp the flask in an upside-down position over a beaker of water in such a way that the glass tube dips inside the beaker.
  • Now heat the flask at the top.
  • The air in the flask expands and moves out of the flask through the tube into the beaker containing water.
  • Observe the bubbles of air inthe water.
  • Now allow the beaker to cool.
  • As the air inside the flask contracts, the water rises up the tube.
  • This proves that gas like air expands on heating and contracts on cooling.

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