A chemistry professor from Florida has shared a fascinating video, showing what happens to a balloon after it's dipped in liquid nitrogen.
Liquid nitrogen is a cryogenic liquid, meaning it can be kept in a liquid state at extremely low temperatures.
When an inflated balloon is dipped into a beaker of liquid nitrogen, the cold temperature causes the air inside the balloon to contract.
This is because gas molecules are moving more slowly, so they collide less frequently and less forcefully with the walls of the balloon, causing it to shrivel up.
In the video, the balloon is lifted out of the beaker and placed on the lab surface, where it immediately starts to re-inflate.
This is because, as the temperature rises, the air inside the balloon expands, allowing the balloon to regains its original volume and shape.
The experiment demonstrates the effect of temperature on volume of gas in a balloon.
The footage was posted online by a chemistry professor from Florida Southwestern State College who goes by the name "Chemical Kim".
"My focus in teaching science has always been to motivate students to investigate their world through experimentation," she wrote in a recent science blog.
