1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Real gas vs ideal gas

  1. Aug 28, 2009 #1
    The compressibility ratio of a gas is PV/nRT. What happen to the compressibility ratio if the attration force between the gas molecules increase? The answer says it decreases because the more molecules interact with each other, so the pressure they exert on the container decreases, thus compressibility ratio decreases. The part I dont understand is according to the real gas equation, real volume increases, and real pressure decreases. If it is true, then shouldnt the compressibility ration remain the same?
  2. jcsd
  3. Aug 28, 2009 #2
    You must note that though what you have thought is true, you have forgotten that when there is a change (delta) in the pressure and volume, you have to take into account the temperature change as well.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook