# What happens in the collapsing bottle experiment?

## What happens in the collapsing bottle experiment?

As the air inside the bottle cools quickly, the air pressure drops quickly inside the bottle. Once the air pressure is lower inside the bottle and higher on the outside of the bottle the outside force of the air pressure pushes down on the bottle and collapses it.

## Why do plastic water bottles collapse?

Pressure in a Bottle If a bottle is capped and then left in the cold, the air inside the bottle cools faster than the air outside the bottle. This means the air outside the bottle is exerting more pressure than the air inside the bottle, and the bottle collapses.

What happened to the pressure of the air inside the bottle when it was moved to the cold place?

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Molecules of hot air are much further apart than molecules of cold air. When you moved the bottle to the cold air, the molecules outside the bottle were closer together, so there were more of them pushing in on the bottle.

### Why does the bottle almost totally collapse by the time you are at bottom of the volcano?

As the liquid nitrogen boils, the pressure inside the bottle increases until it fails, resulting in an explosion.

### What happens to the cap of your plastic bottle filled with water when placed inside the freezer Why does this take place?

When we put the cap on the bottle, the hot air is trapped inside the bottle. When we placed the bottle in the ice and poured cold water on it, the air inside the bottle began to cool down rapidly. Therefore, the air pressure pushing in was greater than the air pressure pushing out, causing the bottle to be crushed!

What happens to the cap of your plastic bottle filled with water when placed inside the freezer?

When the plastic bottle was in the freezer with the cap on, the sides of the bottle collapsed. When the cap is removed, the bottle should return to its regular shape. The cold in the freezer cools the air inside the bottle. As the air temperature changes, the air pressure drops and the sides of the bottle collapse.

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## How do you deflate a plastic bottle?

(1) Pour the very hot tap water into the bottle until is approximately half full and leave the cap off. ***Be careful not to burn yourself with the water*** (2) Swish the water around in the bottle for about one minute. (3) Pour the water out and quickly put the cap on the bottle, ensuring that it is tightly sealed.

## What causes water bottles to shrink?

The air expands caused by increased temperature. After closing the bottle, the air cools down and decreases volume, creating a vacuum, which collapses the bottle.

What causes the air pressure inside the bottle to decrease?

When air is heated it expands and some of it escapes out the bottle. When the matches go out, the air inside the bottle cools and contracts (takes up less space), thus creating a lower air pressure area inside the bottle than outside.

### What is the difference between bottled water and tap water?

Tap water is stored in reservoirs and carried into homes and offices through pipes; it is managed by local municipalities. Bottled water is packaged in plastic bottles and sold in stores. It includes water used in water coolers.

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### Why do plastic bottles crack when you fill them with water?

As a result, more space is required to contain the same initial amount of water. This is why a plastic bottle will crack if you completely fill it with water and leave it in the freezer for too long.

What happens when you pour boiling water into a plastic bottle?

When you pour boiling water into a plastic bottle, the bottle shrinks, warps or twists. Plastic bottles are usually made from Polyethylene terephthalate (PET). PETs are very common( Polyethylene terephthalate – Wikipedia ).

## What causes a glass bottle to collapse?

The difference in pressure causes the bottle to collapse, because the forces pushing in from the outside are much greater than those pressing out from the inside. At the Atomic Level Molecules of hot air are much further apart than molecules of cold air.

## What happens if you hold a water bottle by the neck?

If the bottle is held by the neck it is possible the bottle will extend as the weight of the fluid causes the plastic to flow. This could ultimately result in failure. On a safety note, if you are going to do this experiment please remember to use the correct equipment and protective wear appropriate for the experiment.