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  Home > JCE Print > Journal of Chemical Education > Issues > 1999  > November  >
In the Classroom
Applications and Analogies
Henry's Law and Noisy Knuckles
Doris R. Kimbrough
Chemistry Department Box 194, University of Colorado at Denver, P.O. Box 173364, Denver, CO 80217-3364
Cover
November 1999
Vol. 76 No. 11
p. 1509
Abstract
Henry's law describes the relationship between the pressure of a gas and the concentration of that gas in solution. Presented here is the application of Henry's law to the noise associated with "cracking" knuckles. Gases dissolved in the synovial fluid in joints rapidly come out of solution as the joint is stretched and pressure is decreased. This "cavitation" produces a characteristic noise.
More Information
*  Citation
 Kimbrough, Doris R. J. Chem. Educ. 1999 76 1509.
*  Keywords
 Gases; Introductory / High School Chemistry; Public Understanding; Solutions / Solvents
*  History
 Created:
Last Updated:		 October 12, 1999
June 23, 2005
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