Demonstrating Heat Changes on the Overhead Projector with a Projecting Thermometer

• Chinhyu Hur ^[1] ; Sally Solomon ^[1] ; Christy Wetzel ^[1]
  1. [1] Drexel University

     Drexel University

     City of Philadelphia, Estados Unidos

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 75, Nº 1 (January), 1998, págs. 51-52
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Demonstrating of heat changes is done on the overhead projector byilluminating the red fluid in a nonmercury thermometer using a simple andinexpensive apparatus. The setup, which consists of an alcoholthermometer inserted in a 50-mL plastic tissue culture dish, is placed ona transparency slide marked with divisions that match the readings on thethermometer. Demonstrations that provide dramatic heat changes aredescribed, including chemical reactions , dissolving of solutes andsimulation of flameless ration heaters and commercial hot and cold packs.