This version (2016/04/18 00:00) was approved by svrijn.
Growing Balloon
Introduction
With the help of a balloon and some liquid nitrogen, we can easily explain the concept of expanding gasses while they evaporate.
Description of the Experiment
First we fix an Y-tube, a glass as big as a shotglass with two exits, onto a standard. We attach the balloon to one of the exits, and then we pour some liquid nitrogen into the Y-tube. The other exits is closed with a cork, so the gasseous nitrogen can only escape into the balloon, so the balloon grows.
* Standard LN2 safety issues
* Y-tube can fall and break on the ground, spilling liquid nitrogen
* Standard low temperature safety
Equipment and materials
- Y-tube
- Balloon
- Liquid Nitrogen
- Standard
- Cork
References