Resumen de Demonstration of thermodynamics and kinetics using friXion erasable pens

Dean J. Campbell, Wayne B. Bosma, Stephen J. Bannon, Molly M. Gunter, Margaret K. Hammar

• 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.