Question

Describe an experiment to show that a gas expands on heating.

Answer 1

Aim - To show that gases expand on heating.

Theory -

• When any gas is heated, the gases gain energy and start moving very fast and move away from each other.
• The opposite phenomenon takes place when gases are cooled, they come closer to each other and get condensed.

Requirements - a balloon, liquid nitrogen, container.

Procedure -

• Take a balloon and partially fill it with air.
• Dip the balloon in liquid nitrogen and note the decrease in size.
• Now take the balloon out of liquid nitrogen and keep it at room temperature, note the increase in size.

Observation -

• The size of the balloon decreases when it is cooled.
• The size of the balloon increases when the temperature increases or it is heated.

Result - Thus gases expand on heating.