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Jacques Charles

Jacques Charles
Jacques Alexandre César Charles, 1820
Jacques Alexandre César Charles, 1820
Born November 12, 1746
Died April 7, 1823
Nationality France
Fields physics
Institutions Conservatoire des Arts et Métiers
Known for Charles' Law, hydrometer

Jacques Alexandre César Charles (1746 – 1823) was a French scientist who launched the first hydrogen-filled balloon on August 27, 1783 in Paris. <ref>U.S. Centennial of Flight Commissioners. (n.d.). Jacques Alexandre César Charles. Retrieved February 8, 2009, from http://www.centennialofflight.gov/essay/Dictionary/Charles/DI16.htm</ref>

Around 1787 Charles did an experiment where he filled 5 balloons to the same volume with different gases. He then raised the temperature of the balloons to 80oC and noticed that they all increased in volume by the same amount. This unpublished experiment was later referenced by Gay-Lussac in 1802 when he published a paper on the precise relationship between the volume and temperature of a gas, which Gay-Lussac named "Charles' Law" in honor of Jacques Charles' original experiment. <ref>Wikipedia. (2009). Jacques Charles. Retrieved February 8, 2009, from http://en.wikipedia.org/wiki/Jacques_Charles</ref>


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