Cryogenic Pumping

This experiment looks at how the volume of a gas changes with heating and cooling. You can make a cold bath using isopropyl alcohol and dry ice (the alcohol can get very cold – much colder than water – without freezing). Then take a water bottle and run it under hot water. Put the cap on, submerge it in the bath and see what happens.

Items

  • Tall flask
  • Water bottle
  • Dry ice
  • Food coloring
  • Water

This experiment looks at how the volume of a gas changes with heating and cooling. You can make a cold bath using isopropyl alcohol and dry ice (the alcohol can get very cold – much colder than water – without freezing). Then take a water bottle and run it under hot water. Put the cap on, submerge it in the bath and see what happens.