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general chem q on gas

DanCanDent

New Member
Jun 2, 2009
7
1
  1. Pre-Dental
    The ideal gas law (igl) is a type of estimation of the behavior of real gases. But when the gas is under high pressure and/or low temperature, the equation (PV=nRT) is not very accurate at predicting the characteristics of the gas. The igl assumes that the gas molecules do not have any mass and that the gas molecules are not attracted to one another. Of course gas molecules DO have mass and DO attract one another. To find more accurate values for the number of mole etc, there are several "real gas" equations that can be used (Van der Waals..etc) The igl is good for gases that are not at high P or low T...the van der waals equation will always give good values, but it's a total pain.
     
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