CO2 Dry Cleaning: A Benign Solvent Demonstration Accessible to K–8 Audiences

• Reuben Hudson ^[1] ; Henry M. Ackerman ^[1] ; Lindsay K. Gallo ^[1] ; Addison S. Gwinner ^[1] ; Anna Krauss ^[1] ; John D. Sears ^[1] ; Alexandra Bishop ^[1] ; Kristin N. Esdale ^[1] ; Jeffrey L. Katz ^[1]
  1. [1] Colby College

     Colby College

     City of Waterville, Estados Unidos

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 94, Nº 4, 2017, págs. 480-482
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • A quick demonstration is described to showcase the use of CO2 as an alternative, benign dry cleaning solvent. The demonstration includes visible evidence of CO2 as a solid, a liquid, and a gas, making it ideal as part of a broader lesson on states of matter. The demonstration relies on a technique for generating liquid CO2 in a centrifuge tube, which has been used for extractions in undergraduate teaching laboratories for over a decade. This report represents a unique attempt to transfer this method to the K–8 curriculum.