Ha-3 Absolute Zero Demonstration
Published: Monday 13 March 2006 - Updated: Monday 28 March 2011
To demonstrate that absolute zero is approximately -273°C
- Absolute zero demonstrator
- 3 Beakers
- Bunsen burner
- Ice water, Dry ice in alcohol
Click on pictures to enlarge.
An approximate value of absolute zero may be obtained by plotting pressure versus temperature and extrapolating the line produced to zero pressure.
In use the bulb is submerged successively in boiling water (100°C), ice water 0°C, and dry ice in alcohol (-78.5°C) and the corresponding pressure indicated by the gauge, recorded.