Charless Law By Shelby Canfield Biography His full

Charles's Law By: Shelby Canfield

Biography *His full name is Jacques-Alexandre-Cesar Charles *He was born in Beaugency, Loiret, France on November 12, 1746 *Died in 1823 *Received a liberal education; with no scientific focus *Moved to Paris is 1799 to work in the bureau of finances; This is when he became interested in nonmathematical, experimental physics *In 1781 he began giving public experimental demonstrations; people who had already received considerable no to riety attended these performances *In result from his performances in 1795 he was appointed a resident member of the Academie de Sciences (France Academy of Sciences) *Other positions he held were being a professor of experimental physics/librarian at the Conservatoire de Arts et Métiers *1816 he became president of the Class of Experimental Physics at the academy *Julie- Francoise Bouchard des Herettes became his wife in 1804 and died in 1817 from a long illness

Discovery V 1 = V 2 T 1 T 2 *The discovery of the hydrogen balloon was actually brought Example: about by another experiment of another scientist. Assume *Joseph Montgolfier and his brother Etienne, experimented that 10 cm 3 with hot air and a paper bag. On June 4, 1783 they of a gas has successfully launched a manned balloon made of linen covered a with paper. The fuel for the balloon was an open fire which was temperature fed by the pilot of the balloon. of 200 *The French Academy of Science quickly received news of this degrees event and put Charles in charge of investigating it. absolute. If *At the time British scientist Henry Cavendish just discovered the a gas 14 times lighter than air, and it was being called temperature “flammable air. ” With time they would call this air Hydrogen. is increased *Charles worked with oxygen, nitrogen, carbon dioxide, and to 300 hydrogen to discover this law. degrees *He was studying the compressibility of gas (a century before absolute Boyle). what is the *In his experiments he discovered that at a fixed pressure, new the volume of a gas is proportional to the temperature of the volume? gas. Answer: 15 cm 3

PVT Relationship In the example you can see that a constant pressure is kept in this experiment. As the temperature (absolute temperature) is increased, the volume will increase as well. The discovery of this law helped him make the first gas powered balloon to go up in the air with a human inside. Charles’s design is still used today with balloons: made out of silk, had a solution of rubber dissolved in turpentine to prevent gas from escaping, at the top of a balloon was a tube where expanded gas could escape so the balloon would not blow up. V 1 = V 2 T 1 T 2 Charles's Law Calculator Practice Problems

*Hydrometer *Reflecting Goniometer *Improved the Gravesand heliostat and Fahrenheit’s aerometer *Best known for Charles’s Law and inventing the hydrogen balloon *On August 27, 1783 the balloon ascended to a height of nearly 3, 000 feet *That particular balloon landed outside of Paris, but was “attacked” and destroyed by pheasants who were frightened of it. *On December 1, 1783 he and Aine Roberts achieved a height of 1, 800 feet in the newly built La Charliere. *In return for his achievements Charles’s was elected to the French Academie des Sciences in 1785.

Video Demonstrations http: //www. bing. com/videos/watch/video/charles-law-at-carletonuniversity/DD 0 B 0 F 52 CFA 9 A 87 D 3472

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Biography http: //www. centennialofflight. gov/essay/Dictionary/Charles/DI 16. htm http: //www. bookrags. com/biography/jacques-alexandre-cesar-charles-woc/ http: //www. tpub. com/content/aerographer/14312/css/14312_41. htm