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Volume flow rate

  1. Dec 5, 2014 #1
    • Member warned about posting questions without the homework template
    Hey guys,
    can some of ou help me with this question:
    I need to calculate the volumic flow rate for air by using the ideal gas law. Things i know from the assignment:

    molarmass = 28,96 kg/kmol
    Pressure = 1 bar
    mass flow = 2 kg/s
    t in = 20 degrees celcius
    t out = 50 degrees celcius
    (sorry for bad english, from denmark)
     
  2. jcsd
  3. Dec 5, 2014 #2

    SteamKing

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    PF asks that you post homework and other assignment questions to one of the HW forums.
     
  4. Dec 5, 2014 #3
    From the ideal gas law, what is the density of the air at 20C? what is the density of the air at 50C?

    Chet
     
  5. Dec 11, 2014 #4
    well jeg think it's 1000 kg/m^3, because nothing else is given.
     
  6. Dec 11, 2014 #5

    SteamKing

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    That's some pretty dense air. A cubic meter of a-i-r has a mass of 1000 kg? Are you sure?
     
  7. Dec 11, 2014 #6
    That's the density of water, not air. You need to use the ideal gas law to get the density of air under the process conditions.

    Chet
     
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