Disappearing-reappearing rabbit trick: A new twist to an old liquid nitrogen demonstration

• Elaine K. Haub ^[1]
  1. [1] Indiana University Southeast

     Indiana University Southeast

     Township of New Albany, Estados Unidos

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 78, Nº 1, 2001, pág. 46
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Demonstrations using liquid nitrogen are very common in chemistry courses and chemistry outreach programs. The shrinking of a balloon when cooled and its subsequent "re-inflation" upon warming is a crowd pleaser. Audience members have been known to exclaim that this is chemistry magic. Toying with that idea has led to a new twist to this old demonstration. A magic hat with a suitable container inserted holds the liquid nitrogen. Instead of a regular balloon, I use a balloon animal in the shape of a rabbit. The rabbit "disappears" as it is lowered into the hat and "reappears" when it is removed from the hat.