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Homework Help: Coexistance Curve

  1. Apr 9, 2010 #1
    1. The problem statement, all variables and given/known data
    Consider the liquid-gas coexistence curve. Show that C[tex]_{(g)}[/tex] − C[tex]_{(l)}[/tex] = T([tex]\stackrel{d}{dT}[/tex] [tex]\Delta[/tex][tex]_{(vap)}[/tex]S) for T, P along the coexistence curve. Now use the fact that
    [tex]\Delta[/tex](vap)S = [tex]\Delta[/tex](vap)H/T along the coexistence curve, and the fact that [tex]\Delta[/tex](vap)H is positive and decreases with increasing T, to show that C(g) < C(l) . Note that this inequality applies only at Tvap.

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Apr 10, 2010 #2


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    Please show us what you have tried. We can not help you unless you first put in some effort.
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