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Thread: triple point estimation

  1. #1 triple point estimation 
    Forum Freshman
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    I have this homework question (not for a grade) and I have no idea where to begin.
    The temperature dependence of the vapour pressure of solid sulfur dioxide can be approximately represented by the relation log(p/Torr)=10.5916 - 1871.2/(T/K) and that of liquid sulfur dioxide by log(p/Torr) = 8.3186 - 1425.7/(T/K). Estimate the temperature and pressure of the triple point of sulfur dioxide.

    any ideas?


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  3. #2  
    Forum Isotope Bunbury's Avatar
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    Sometimes it helps to draw a graph.


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  4. #3  
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    Set the two equations equal to each other and solve for T. Then solve for P in either of the equations.
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