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  Home > JCE Print > Journal of Chemical Education > Issues > 2002  > February  >
In the Laboratory
Rare Gas Viscosities: A Learning Tool
Arthur M. Halpern
Department of Chemistry, Indiana State University, Terre Haute, IN 47809
Cover
February 2002
Vol. 79 No. 2
p. 214
Abstract
The viscosities, h, of the rare gases and SF6 are determined in a physical chemistry laboratory experiment using the evacuation method, which is based on Poiseuille's equation. Students become aware that h does not vary monotonically with row number (or atomic mass) and confirm this behavior on the basis of the kinetic theory expression for h. They find that the collision diameters of the gases, s, which are obtained from h values, increase monotonically with molar mass, as expected. Students can show that values of s obtained from gas viscosities agree reasonably well with ab initio calculations of atomic (molecular) diameters using Gaussian 98W.
More Information
*  Citation
 Halpern, Arthur M. J. Chem. Educ. 2002 79 214.
*  Keywords
 Gases; Laboratory Instruction; Physical Chemistry; Teaching/Learning Theory/Practice
*  History
 Created:
Last Updated:		 January 2, 2002
March 16, 2005
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