Diagram of between ethanol and water forming a binary vapour liquid equilibrium

Computer Science

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This diagram illustrates the vapor-liquid equilibrium (VLE) between ethanol and water.

  • The x-axis typically represents the mole fraction of one component (e.g., ethanol) in the liquid phase.
  • The y-axis typically represents the mole fraction of the same component (ethanol) in the vapor phase.
  • The lower curve is the bubble point curve, showing the temperature at which the first bubble of vapor appears for a given liquid composition.
  • The upper curve is the dew point curve, showing the temperature at which the first drop of liquid appears for a given vapor composition.
  • The region between the curves represents the two-phase region where both liquid and vapor coexist.
  • The area below the bubble point curve is the liquid phase region.
  • The area above the dew point curve is the vapor phase region.
  • The temperature is usually plotted on the y-axis or shown as isotherms.
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