Crystals Out of "Thin Air"

• John J. Vollmer ^[1]
  1. [1] Mills College

     Mills College

     Estados Unidos

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 77, Nº 4 (April), 2000, págs. 486-486
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Sublimation is an excellent method to introduce crystals and crystal formation. In this experiment crystals of para-dichlorobenzene form readily and efficiently from mothballs in a safe setting, using canning jars with ice cubes. The experiment can serve as an introduction to the concept of molecules, especially when combined with the condensation of liquids and the perception of odors. This sublimation is presented for elementary school teachers, but can be an effective demonstration in other settings.