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Unformatted text preview: n text!):
n l x T − y 2 pv
nV = x2 − xT =
Example 6.3, Problems 6.9–6.11, 6.13–6.18 Pressure-composition diagram to Temperature-composition diagram: Figure 6.5, 6.6 Notes:
Higher vapor pressure Þ lower boiling point.
Neither the liquid curve or the vapor curve generally appear as straight lines
in temperature-composition space. Temperature-Composition or “Distillation” diagrams:
diagrams are drawn at fixed
pressure, usually 1 atm or 1.013
bar. Consider liquid at composition p.
If we raise the temperature, the
liquid will start boiling when it
reaches the bubble-point line at
that composition, denoted by the
point l. The vapor formed at this
temperature has the composition
given by the tie-line to the
dew-point line, denoted by the
point v. The vapor is richer in the more
volatile component. Therefore,
the liquid left behind is richer in
the less volatile component. Fig 6.7 If this is a sealed system and the vapor is not allowed to escape, the
tempearture will remain stead...
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