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Homework Help: Density pressure Temprature

  1. Apr 3, 2012 #1
    1. The problem statement, all variables and given/known data
    I have a grid with
    Surrounding density = rho
    Surrounding Temp = T
    Surrounding Pressure = P

    And I also have denser particles which over all have
    density = 10rho
    temp = 10T
    Pressure = P

    Now I want to average the densities, and have that as my new surrounding density with no particles .. But if i take the averages, I will get a different value for the pressure whiche doesnt make sense
    How would I take the average ?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Apr 4, 2012 #2
    If the particles don't follow the same equation of state, how do you calculate the pressure for the combined gas? Or should you have the temperature of denser particles be 1/10 T?
  4. Apr 4, 2012 #3
    sorry yes T= 1/10 K
    and I think i worked it out, would this be the average density:

    (Volume of particle/total volume)*(10rho) + (Volume of surrounding/total volume)*rho = Average density
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