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. (Image: Viral Hog)(Image: Viral Hog)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. (Image: Viral Hog)(Image: Viral Hog)The experiment demonstrates the effect of temperature on volume of gas in a balloon.

Source: Daily Mirror May 09, 2019 16:29 UTC