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M*P(v2-v1) because pressure is constant

  1. Sep 29, 2008 #1
    1. The problem statement, all variables and given/known data


    HI I have a couple of questions pertain to the sample test 1 could you please help me ?
    I am working on problem 3 .


    This is what I got so far.


    I know that the boundary work will be M*P(v2-v1)
    because pressure is constant .

    OK, so they give me pressure 150 psi
    and X=.8 SM. Therefore I can find my V/me =2.4156 ft ^3/lbm
    Therefore I can find my mass =V/(V/m)= 4.13976 lbm
    Now I am to go to state 2 where pressure = 150 psi and I am a saturated vapor therefore I need to take the value of vg on my table =3.0150 ft^3/lbm.

    NOW this is where the confusion comes in is my final temp tsat because I am still in a mixture ????? How do I find final temp?




    Please help......





    2. Relevant equations



    3. The attempt at a solution
     

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