Calculating Average Density and Pressure for Denser Particles

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SUMMARY

The discussion focuses on calculating the average density and pressure of a system containing denser particles with a density of 10rho, temperature of 1/10 T, and pressure P, compared to surrounding conditions of density rho, temperature T, and pressure P. The user seeks to determine the correct method for averaging these values without violating the principles of thermodynamics. The proposed solution involves using a weighted average based on the volume fractions of the denser particles and the surrounding medium, specifically: (Volume of particle/total volume)*(10rho) + (Volume of surrounding/total volume)*rho for average density.

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Homework Statement


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 doesn't make sense
How would I take the average ?



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The Attempt at a Solution

 
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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?
 
clamtrox said:
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?

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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