Introduction

Several pre-shrunk balloons are pulled from a single Dewar of liquid nitrogen and inflate back to their original size. 

 

Balloon in nitrogen

To Conduct Demonstration

  1. Using tongs and gloves, pull pre-shrunk balloons from the Dewar. They will inflate back to their regular size.

Reaction Time: 15 min

Safety 

Take care when using liquid nitrogen to avoid prolonged contact with skin.