An empty plastic bottle is sealed in a cool room and then moved to a very hot room. What can best be stated about the air pressure inside the bottle when the bottle reaches room temperature?

The bottle is sealed, so the amount of air inside stays the same. As it warms, the air pressure initially rises, but the flexible plastic bottle expands until the pressure inside balances the pressure outside. Thus, when it reaches room temperature in the hot room, the inside pressure is best stated to be the same as the outside pressure: choice A.

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