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ERIC Number: EJ820842
Record Type: Journal
Publication Date: 2007-Nov
Pages: 3
Abstractor: As Provided
ISSN: ISSN-0021-9584
Dancing Crystals: A Dramatic Illustration of Intermolecular Forces
Mundell, Donald W.
Journal of Chemical Education, v84 n11 p1773-1775 Nov 2007
Crystals of naphthalene form on the surface of an acetone solution and dance about in an animated fashion illustrating surface tension, crystallization, and intermolecular forces. Additional experiments reveal the properties of the solution. Flows within the solutions can be visualized by various means. Previous demonstrations of surface motion are explored and compared with the dancing crystals. London, dipole-induced dipole, and dipole-dipole forces are discussed. This demonstration can be used for discussion of intermolecular forces, properties of liquids, surface tension, Marangoni effects, crystallization, solubility, and heat of solution. Video presentations are also available for this article. (Contains 2 figures and 1 note.)
Division of Chemical Education of the American Chemical Society. Subscription Department, P.O. Box 1267, Bellmawr, NJ 08099-1267. Tel: 800-691-9846; Tel: 856-931-5825; Fax: 856-931-4115; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A