Determine the quality/moisture of the vapor/water mixture

  • Chemistry
  • Thread starter Krokodrile
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  • #1
Krokodrile
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Homework Statement:
1.- A 20 L container without air contains 5 kg of pure water at 250 Celcius. Determines the mass and volume of the liquid water as well as the quality and moisture.

2.-An 80% quality saturated water vapor mixture has a temperature of 210 Celsius. Determine the pressure, the specific volume of the mixture as well as the specific energy of the mixture
Relevant Equations:
X = v - vf/vg - vf
v = V/m
x = mg / n
Vg = mg (vg)
Hello! ;)
I need help with two problems.

I ready resolve it, but i have a question about if a use the units of the correct way. Because got a little strange results.

Captura de Pantalla 2021-05-22 a la(s) 20.41.35.png
 

Answers and Replies

  • #2
Borek
Mentor
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No idea what you mean by "quality" and your symbols are a bit cryptic. Please elaborate.
 
  • #3
Krokodrile
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No idea what you mean by "quality" and your symbols are a bit cryptic. Please elaborate.
Quality: mass fraction of vapor in a liquid/vapor mixture
vf = specific volume of steam
vg = specific volume of liquid
x = quality
 
  • #4
mjc123
Science Advisor
Homework Helper
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vf = specific volume of steam
vg = specific volume of liquid
Looks like it's the other way round, looking at the numbers.
 
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Likes jim mcnamara
  • #5
Krokodrile
45
3
Looks like it's the other way round, looking at the numbers.
vf = specific volume of liquid
vg = specific volume of steam

so, sorry. Yep, my mistake
 

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