Demonstration of thermodynamics and kinetics using friXion erasable pens

• Autores: Dean J. Campbell, Wayne B. Bosma, Stephen J. Bannon, Molly M. Gunter, Margaret K. Hammar
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 89, Nº 4, 2012, págs. 526-528
• Idioma: inglés
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• Resumen

  • FriXion erasable pens contain thermochromic inks that have colored low-temperature forms and colorless high-temperature forms. Liquid nitrogen can be used to kinetically trap the high-temperature forms of the ink at temperatures at which ordinarily the low-temperature forms are more thermodynamically stable.