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Topic: Quality and percent volume  (Read 3853 times)

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Offline physstudent1

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Quality and percent volume
« on: January 29, 2009, 05:47:23 PM »
1. The problem statement, all variables and given/known data

A rigid container of volume 1 m^3 contains saturated water at 1MPa.  If the quality is .10, what is the volume occupied by the vapor.

2. Relevant equations



3. The attempt at a solution
I wanted to use the equation v=(1-x)(v_l)+x(v_v)

where all v's are specific volumes bc I can look up the specific vapor and liquid volumes at this temperature.  however I don't know the specific volume of the overall system or the total mass so I am kinda stuck can anyone help?

Offline physstudent1

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Re: Quality and percent volume
« Reply #1 on: January 29, 2009, 09:53:24 PM »
I did (.10/5.14) / ((.10/5.14)+(.90/887.3)) to get .95 vapor by volume I'm not sure if this will work though the examples i found had how much mass over each density instead of the mass fractions.  I am not supplied with a mass though only with mass fractions so that's what I used can anyone comment on if this right please I know its last minute but it's due tomorrow =/

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