Suggested to wear gloves and safety glasses while doing experiments with hot water.Īvoid handling hot water by small kids. Have adult supervision at all times during the experiment to avoid any unforeseen incidents. This is how the volume of air calculated: That is why the inflated Balloon deflates when the bottle is placed inside a cold water container.
When the air molecules become colder, air molecules’ density gets back to a denser state and requires less space to occupy. Here, the cold air molecules replace the hot air molecules because hot air molecules cool down due to cold water. When they become less dense, it requires more space to settle, and that is why the Balloon starts inflating to provide more space for hot air molecules.Īnd when the Balloon inflates in hot water, bring it into the container containing cold water. These hot air molecules move faster inside the Balloon and occupy more space as they become less dense than usual. It is because the hot air molecules enter into the Balloon from the bottle, which is in a hot water container. In this activity, when we attach a balloon over the bottle’s mouth and place it in a hot water container, the Balloon starts inflating.
Well, an empty water bottle is also populated with a certain amount of air molecules inside it-the air molecules inside and outside the bottle move with equal pressures at normal surrounding conditions. The quantity of air occupied in a particular space, i.e., an open or closed container, denotes ‘Volume.’ Science Behind Expanding Balloon on Hot Water
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