- Water can be boiled in a vacuum chamber while a digital thermometer shows that the water temperature remains unchanged.
- A video camera may be needed to display the temperature in a large classroom.
- Please keep this demonstration brief so that vacuum pump does not become saturated with water.
- Wear face shield while chamber is evacuated.
(inspect bell jar)
(fill 250 ml erlenmeyer flask to 150 ml)
(use water slightly above room temperature to show that thermometer works)