Hot soap bubble

This activity demonstrates air expansion and the formation of bubbles. A glass bottle is dipped into a soap solution so that a thin layer of soap forms over the mouth of the bottle. The bottle is then held in such a way that it is completely touching the sides of the bottle, and over time, small bubbles begin to form on the mouth of the bottle. This occurs because the air inside the bottle expands, pushing outwards and causing the soap film to create bubbles. The expansion of air inside the sealed bottle is responsible for the bubble formation as it interacts with the soap layer. 

Learning Objective:

To explore the relationship between temperature and the expansion or contraction of air, highlighting the effects of heat on gas volume and demonstrating principles of thermal expansion and contraction. 

Tags:
Air expansion, Air contraction, Thermal expansion, Gas behaviour, Temperature effects, Thermodynamics.