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Homework Help: Quality of mixture

  1. Jun 18, 2013 #1
    1. The problem statement, all variables and given/known data

    If you have a mixture of saturated water vapor and saturated liquid water at a pressure of 5000 kPa, and you measure its specific volume to be 0.03181 m^3/kg, what is the quality of the mixture?

    2. Relevant equations

    Nothing is given :(

    From lectures I found vtot = (1-x)vf+xvg

    3. The attempt at a solution

    From the saturation table for steam, for 50 bar (or 5000kPa) the values of vf and vg are 1.286 and 0.039, respectively.

    I'm supposing the specific volume in the problem is vtot= 0.03181

    x=vtot-vf/vg-vf = 1.00 which is wrong as p the choices. I'll appreciate if someone can point out what I'm doing wrong, and help me solve this problem. Thanks in advance!
  2. jcsd
  3. Jun 18, 2013 #2
    It looks like you solved for x incorrectly. Recheck your algebra.
  4. Jun 19, 2013 #3
    Actually it's correct but the value of vf was supposed to be 0.01286, which was causing the mistake. Thanks for your help Chestermiller :)
  5. Jun 19, 2013 #4
    What I meant was that there were parenthesis missing.

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