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Thread: Figure out the phase change temperatures at pressure P?

  1. #1 Figure out the phase change temperatures at pressure P? 
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    So, Water boils at 100C under normal sea-level air pressure. In Denver, it boils at around 95C, or something like that.
    Another example is how a pressure cooker increases the temperature at which liquids boil.

    The thing is I am trying to find a formula that will let me calculate the phase change temperature for object X at Pressure P, hopefully of density ρ.

    Since I don't have experience in differential equations, it would be nice if I could find one that is straight boring algebra, but a differential will work if nothing else is available.


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    Forum Isotope Bunbury's Avatar
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    For liquid/vapor phase change google the Antoine equation.


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    This looks like the kind of thing I am looking for. However, A, B and C are component-specific constants. What would I use in place of these in the case of water?[/img]
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    Quote Originally Posted by Leopardson


    This looks like the kind of thing I am looking for. However, A, B and C are component-specific constants. What would I use in place of these in the case of water?[/img]
    Why wouldn't you just want to use the steam tables for water?
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    Forum Isotope Bunbury's Avatar
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    Forum Isotope Bunbury's Avatar
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    Quote Originally Posted by Harold14370
    Thanks - that's very handy.
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  9. #8  
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    Quote Originally Posted by Bunbury
    Quote Originally Posted by Harold14370
    Thanks - that's very handy.
    You're welcome.
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