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.
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Citation
Kimbrough, Doris R. J. Chem. Educ.1999 76 1509.
Keywords
Gases; Introductory / High School Chemistry; Public Understanding; Solutions / Solvents
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