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       #Post#: 321--------------------------------------------------
       Real Gases
   DIR By: akriti
       Date: June 18, 2012, 2:23 am
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       An ideal gas is one which obeys the gas laws and the gas
       equation PV=nRT at all the pressures and temperatures . However,
       no gas is ideal. Almost all gases show deviations from the ideal
       behaviour and are called real gases.
       The quantity PV/nRT=Z is called compressibility factor and
       should be unity for an ideal gas.
       #Post#: 322--------------------------------------------------
       Re: Real Gases
   DIR By: Michel
       Date: June 18, 2012, 3:22 am
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       At ordinary temperatures and pressures, the van der waal forces
       between the gas molecules are not very significant, however at
       low temperatures and high pressures, these forces become very
       significant, enough to change their state to liquid. Gases like
       SO2 have strong dipole-dipole attraction making them easily
       liquefied. Chlorine can be liquefied at a relatively low
       pressure of 6atm.
       
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