2 replies to this topic

[drawingtheline]

Hi,

 

I have a graph of a gases Z compressibility factor which varies with pressure. 

 

How do I then apply this with boyles law when I am looking for P2.

 

ie P2 = P1V1/V2

 

Do i just multiply the result by Z2/Z1?

 

Thanks

Edited by drawingtheline, 20 December 2013 - 03:20 AM.

[katmar]

Work from the gas equation, i.e. PV = ZnRT

 

P₁ = Z₁nRT₁ / V₁    and similarly   P₂ = Z₂nRT₂ / V₂

 

so P₂ / P₁ = ???

[drawingtheline]

OK thanks;

 

With T1, T2, n, and R being constants, then;

 

P2/P1 = (Z2/Z1) * (V1/V2)

 

Which then means;

 

P2= (Z2/Z1) * (V1/V2) * P1