From the following information, sketch and label the phase diagram for CH3COOH. The melting point of the solid is 16.6°C under its own vapour pressure of 9.1 mm Hg. Solid CH3COOH exists in two modifications, I and II, both of which are denser than the liquid, and I is the stable modification at low pressure.  Phases I, II, and the liquid are in equilibrium at 55.2°C under a pressure of 2000 atm. The transition temperature from I to II decreases as the pressure is decreased.

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From the following information, sketch and label the phase diagram for CH3COOH.

  • The melting point of the solid is 16.6°C under its own vapour pressure of 9.1 mm Hg.
  • Solid CH3COOH exists in two modifications, I and II, both of which are denser than the liquid, and I is the stable modification at low pressure. 
  • Phases I, II, and the liquid are in equilibrium at 55.2°C under a pressure of 2000 atm.
  • The transition temperature from I to II decreases as the pressure is decreased.
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