Description: Heating or cooling flasks of NO2 and N2O4 shifts the equilibrium between these two species. When more NO2 is produced, the color of the gas inside the flask becomes darker.

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Source: Shakhashiri, B.Z. Chemical Demonstrations: A Handbook for Teachers of Chemistry

Year or vol: 2 page: 180

Keywords: Nitrogen (IV) Oxide, Equilibrium, Temperature Effect On, Equilibrium, Pressure Effect On, Syringe