Difference between revisions of "Cloud Maker -- Adiabatic Expansion"
From UO Physics Demonstration Catalog
(Created page with "{{NewDemo|subject=Thermodynamics|topic=Heat and the First Law|file1=Adiabatic_Clouds.gif}} A small amount of smoke from a burning match is introduced into the flask and the air is inside is saturated with water vapor by shaking the water inside. Pressing the bulb compresses the air in the flask, and releasing it causes expansion and cooling, forming a cloud. '''Location: ''' * Shelf T-2") |
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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 | ||
* 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
