Difference between revisions of "Cloud Maker -- Adiabatic Expansion"
From UO Physics Demonstration Catalog
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{{NewDemo|subject=Thermodynamics|topic=Heat and the First Law| | {{NewDemo|subject=Thermodynamics|topic=Heat and the First Law||file2=Cloud make 2.jpg|file3=Cloud make 1.jpg}} | ||
A small amount of smoke from a burning match or small piece of burnt tissue is introduced to the large jar, the jar is then plugged with a rubber stopper. The pressure inside the jar is increased via a bicycle pump. After ~5 pumps close, the valve on top of the rubber stopper. Reopening the valve allows air out rapidly, adiabatic expansion cools the air, condensing the water vapor into a cloud inside the chamber. Illuminating the chamber increases visibility. | |||
'''Location: | '''Location: | ||
''' | ''' | ||
* Shelf T-2 | * Jar: Shelf T-2 | ||
*Lamp | * Lighter: shelf to the left of tool-box | ||
* Bicycle Pump: Shelf G1 | |||
* Lamp: Q-3 | |||
* plug: with Jar on Shelf T-2 | |||
Latest revision as of 14:08, 24 February 2025
Return to Heat and the First Law
Description:
A small amount of smoke from a burning match or small piece of burnt tissue is introduced to the large jar, the jar is then plugged with a rubber stopper. The pressure inside the jar is increased via a bicycle pump. After ~5 pumps close, the valve on top of the rubber stopper. Reopening the valve allows air out rapidly, adiabatic expansion cools the air, condensing the water vapor into a cloud inside the chamber. Illuminating the chamber increases visibility.
Location:
- Jar: Shelf T-2
- Lighter: shelf to the left of tool-box
- Bicycle Pump: Shelf G1
- Lamp: Q-3
- plug: with Jar on Shelf T-2
