At room temperature, nitrogen tetroxide partially dissociates, turning into
nitrogen dioxide:
166
N₂O₄ ⇌ 2NO₂
0.92 g of N₂O₄ liquid is introduced into the pumped vessel with a capacity of 250
cm³ at 0°C. When the temperature in the vessel increases to 27°C, the liquid
completely evaporates, and the pressure becomes equal to 128 kPa. Determine
the proportion of nitrogen tetroxide that has dissociated.