Cooling by evacuation
Principle
When the air pressure above a watersurface is reduced, the water begins to boil at a certain temperature. The temperature of the water is hereby reduced and further evacuation can finally bring it to 0 °C and even lower.
Benefits
- Data logging via tablet possible.
- For both demonstration and student experiments
Cobra4 Wireless/USB-Link incl. USB cable
Cobra4 Sensor-Unit Temperature
Boiling beads, 200 g
Universal clamp
Rubber tubing,vacuum,i.d.8mm
Hose clamp for 15-22 mm diameter
Beaker, 1000 ml, high-form
Tubing connect.,T-shape,ID 8-9 mm
Support base DEMO
Bell jar, with knob and sealing ring
Hose nipple DN 10
Protection cylinder for bell-jar
Pump plate, complete
Rotary valve vacuum pump, two stages, 115 V / 230 V
Manometer -1.0…0.6 bar
Felt sheet, 100 x 100 mm
curricuLAB measureLAB
Tasks
Determine the temperature curve of water during pumping.
What you can learn about
- Air pressure
- Kinetic gas theory
- Supercooling