A U-Tube Experiment To Discover the Curve in Boyle's Law
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Thomas G. Richmond [1] ; Amy Parr [1]
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[1] University of Utah
University of Utah
Estados Unidos
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- Localización: Journal of chemical education, ISSN 0021-9584, Vol. 74, Nº 4 (April), 1997, págs. 414-415
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
A discovery-style experiment is described to enable introductory chemistry students to determine the pressure versus volume behavior of a gas over a wide pressure range to "discover" Boyle's Law. A small volume of air is trapped by water or mineral oil in the sealed end of a 10-mL graduated pipet that has been bent in the shape of a U. The external pressure is reduced using a water aspirator to expand the gas sample as far as possible. The volume of the gas as a function of pressure (measured with a Bourdon tube absolute pressure gauge) is recorded as air is leaked back into the system through a needle valve. The experiment overcomes some of the limitations of previous methods and offers opportunities for several levels of data analysis.
