Objective:
– To show the pressure vs. temperature behaviour of a gas at constant volume.
Apparatus:
- PASCO Capstone
- Wireless temperature sensor
- Wireless pressure sensor
- Absolute zero sphere
- Temperature baths at various temperatures
Note:
By putting the sphere in baths of different temperatures and noting the pressure readings, we can see a direct P vs. T dependence, i.e., Gay-Lussac’s Law. Additionally, by extrapolating down to zero pressure, we can get a (surprisingly accurate!) estimate of absolute zero temperature. Therefore, this demo can serve as an example of the usefulness of linear fitting and extrapolation.