Final answer:
When a gas changes into a liquid inside a flexible container like a balloon, it occupies less volume, expands the shape of the container, and becomes less dense.
Step-by-step explanation:
As a gas changes state into a liquid inside of a flexible container such as a balloon, several things occur. Firstly, the gas occupies less volume inside of the container. This is because the gas molecules are now closer together and arranged in a more condensed state. Secondly, the gas expands the shape of the container. This is due to the increased pressure caused by the increase in number of gas molecules. Lastly, the gas becomes less dense. This is because the density of a substance typically increases as it changes from a gas to a liquid state.
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