Nitrogen dioxide equilibrium. Nitrogen dioxide (NO2) gas exists in equilibrium with dinitrogen tetroxide (N2O4) gas, 2NO2 N2O4. Two volumetric flasks are filled with nitrogen dioxide. One flask is at room temperature (left), while the other is placed in iced water (right). According to Le Chatelier's principle higher temperature shifts the equilibrium to nitrogen dioxide (brown colour) while lower temperature shifts the equilibrium to dinitrogen tetroxide (colourless). | |
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