A plastic water bottle is filled with hot water. Will the steam expel air from inside of the bottle? After about 2 minutes the bottle is closed tightly and put in a container with cold water and ice. As the bottle cools down will the steam condense or not? Will the bottle get crushed?
Two reasons describing different effects.
Sufficiently hot water will shrink a plastic bottle, because the bottles are a thermoplastic. When heated to a certain point, the plastic becomes more plastic, and will deform. This can be seen as shrinking. Also, it's chemical makeup is that of a complex polymer, so it's likely folding onto itself when heated as well.
The reason why water put in a freezer will pop the top is because water expands when it freezes. At a point, it has nowhere to expand to. When this happens, Pascal’s Law tells us that a contained liquid under pressure will exert even pressure on all sides. The water is under pressure because it's volume is increasing in a closed container. The top comes off because it is the weakest point of the container, and so, acts as a pop off valve.
hope it helps
Two reasons describing different effects.
Sufficiently hot water will shrink a plastic bottle, because the bottles are a thermoplastic. When heated to a certain point, the plastic becomes more plastic, and will deform. This can be seen as shrinking. Also, it's chemical makeup is that of a complex polymer, so it's likely folding onto itself when heated as well.
The reason why water put in a freezer will pop the top is because water expands when it freezes. At a point, it has nowhere to expand to. When this happens, Pascal’s Law tells us that a contained liquid under pressure will exert even pressure on all sides. The water is under pressure because it's volume is increasing in a closed container. The top comes off because it is the weakest point of the container, and so, acts as a pop off valve.
hope it helps
