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Size: 1719
Comment:
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Size: 2221
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
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| * '''Cabinet:''' [:ThermoCabinet:Thermodynamics Cabinet] * '''Bay:''' [:ThermoCabinetBayA2:A2] |
* '''Cabinet:''' Thermodynamics Cabinet * '''Bay:''' (A2) |
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| (attachment photo showing the fully set up demonstration) | attachment:4C31-30_02i-400.jpg |
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| || || || || ||150 ml. beaker ||Shelf over the || || |
||Drinking Bird||[:ThermoCabinetBayA2: TD, Bay A2, Shelf #5]||<:> 4C31.30|| ||150 ml. beaker||Shelf over the sink area 2237||<:> NA || |
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| 1. Set up like picture above. 1. Make the felt of bird wet. |
1. Make sure that the drinking bird is assembled. If not do the following. - 1. Make the felt of bird wet.(The more the head wet the fast the demonstration happens.) |
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| 1. | 1. Do not break the tube( bird body). The red liquid (dichloromethane or methylene chloride)is an acute inhalation hazard and can cause optic neuropathy and hepatitis. |
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| Put water on the felt of bird. When water evaporates, it makes the temperature of the glass head lower. This makes some of the dichloromethane(red liquid)vapor to condense. From ideal gas law, the pressure in the head of the bird drop due to the lower temperature and condensation. The difference of the pressure between the head and base of the bird causes the red liquid to be pushed up from the base. Then the head of the bird become heavy and tips over. While the bird tips over, it make air hole that can make red liquid flows back to the bottom bulb and this makes bird go back to its vertical position again. And this will occur periodically until the water on the felt of bird dry. |
Put water on the felt of bird. When water evaporates, it makes the temperature of the glass head lower. This makes some of the red liquid (dichloromethane or methylene chloride) vapor to condense. From ideal gas law, the pressure in the head of the bird drop due to the lower temperature and condensation.The difference of the pressure between the head and base of the bird causes the red liquid to be pushed up from the base. Then the head of the bird become heavy and tips over. While the bird tips over, it make air hole that can make red liquid flows back to the bottom bulb and this makes bird go back to its vertical position again. And this will occur periodically until the water on the felt of bird dry. |
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| ||attachment:DrinkingBird-01.gif||attachment other photos|| ||attachment other photos||attachment other photos|| |
||<style="border:0"> attachment:4C31-30_03i.jpg ||<style="border:0" |2> ||<style="border:0" |2> attachment:DrinkingBird-01.gif||<style="border:0" |2> ||<style="border:0" |2> Move: attachment:DrnkingBird.mpg || ||<style="border:0"> attachment:4C31-30_04i.jpg|| attachment:DrnkingBird.mpg |
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| 1. http://en.wikipedia.org/wiki/Drinking_bird [Insert a back link to main topic list] |
1. [http://en.wikipedia.org/wiki/Drinking_bird Wikipedia] [:Thermodynamics:Thermodynamics] |
Drinking Bird, 4C31.30
Location:
Cabinet: Thermodynamics Cabinet
Bay: (A2)
Shelf: #5
attachment:4C31-30_02i-400.jpg
Description: Also called Dippy Bird or Tippy Bird.
Equipment |
Location |
ID Number |
Drinking Bird |
[:ThermoCabinetBayA2: TD, Bay A2, Shelf #5] |
4C31.30 |
150 ml. beaker |
Shelf over the sink area 2237 |
NA |
Setup:
- Make sure that the drinking bird is assembled. If not do the following.
- -
- Make the felt of bird wet.(The more the head wet the fast the demonstration happens.)
- Wait until you see the red liquid grow up.
Cautions, Warnings, or Safety Concerns:
- Do not break the tube( bird body). The red liquid (dichloromethane or methylene chloride)is an acute inhalation hazard and can cause optic neuropathy and hepatitis.
Demonstration:
Put water on the felt of bird. When water evaporates, it makes the temperature of the glass head lower. This makes some of the red liquid (dichloromethane or methylene chloride) vapor to condense. From ideal gas law, the pressure in the head of the bird drop due to the lower temperature and condensation.The difference of the pressure between the head and base of the bird causes the red liquid to be pushed up from the base. Then the head of the bird become heavy and tips over. While the bird tips over, it make air hole that can make red liquid flows back to the bottom bulb and this makes bird go back to its vertical position again. And this will occur periodically until the water on the felt of bird dry.
attachment:4C31-30_03i.jpg |
|
attachment:DrinkingBird-01.gif |
|
Move: attachment:DrnkingBird.mpg |
attachment:4C31-30_04i.jpg |
attachment:DrnkingBird.mpg
References:
[http://en.wikipedia.org/wiki/Drinking_bird Wikipedia]
[:Thermodynamics:Thermodynamics]
[:Demonstrations:Demonstrations]
[:Instructional:Home]