By: Lindsay Bradshaw

*The Amazing Drinking Bird

*Summary

*Designed by Miles V. Sullivan in 1945*Made of glass with tube running through two bulbs that make up the head and stomach*Bird’s “body” is attached to two plastic legs by a metal fulcrum (Gillespie 6)

*Summaryhttp://

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*Feathers, hat, and eyes for decoration*Cloth material blankets the bird’s head to help the bird complete it’s task (Helmenstine 7)

*Chemistry

*Initially in a state of equilibrium with small amount of methylene chloride*When dipped in water, the water evaporates off of the beak causing the head to drop in temperature (Rohrig 3)

*Chemistry

*This reduction of temperature results in methylene chloride condensing into droplets in the bird’s head*Condensation of methylene chloride occurs because of the weakness of the intermolecular bonds in liquid phase*Liquid evaporates easily, lowering vapor pressure in top bulb (Gillespie 6)

*Chemistry

*Difference in vapor pressure causes equilibrium to shift, making the liquid start to rise into the top*Bird tips over and “drinks” the water*Bubbles of vapor in tube push liquid back into the bottom bulb*This process continues forever, unless the bird does not make contact with the water (Rohrig 1)

*Implications

*Demonstrates evaporation and condensation*Variety of applications like weather prediction, cooking, and air travel (Helmenstine 7)

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*Works Cited

*Gillespie, Carol. "How a Drinking Bird Works." Sciences 360. Helium, 15 Nov. 2009. Web. 13 Apr. 2014. <http://www.sciences360.com/index.php/how-a-drinking-bird-works-12678/>.*Helmenstine, Anne Marie. "How the Drinking Bird Science Toy

Works." About.com Chemistry. About.com, n.d. Web. 26 Apr. 2014. <http://chemistry.about.com/od/physicalchemistrythermo/a/How-The-Drinking-Bird-Science-Toy-Works.htm>.*Rohrig, Brian. "The Amazing Drinking Bird." American

Chemical Society. American Chemical Society, 2014. Web. 3 Apr. 2014. <http://highschoolenergy.acs.org/content/hsef/en/what-is-energy/drinking-bird.html>.