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Unformatted text preview: the partial pressure exerted by the methane?
Component Methane Ethane Propane Mol fraction 0.85 0.10 0.05 Apparent Molecular Weight Multiply the molecular weight of each component by the mol fraction of that component in the mixture, then sum to get the apparent molecular weight of the mixture. To find specific gravity of a mixture, divide the apparent molecular weight by 29 (molecular weight of air) Zfactors and specific gravity Example 38 Example 39 (also find mass in lbs) When there is a heptanes+: Example 310 When the composition is unknown: Use specific gravity and Fig 31: Example 311 When H2S and CO2 are present: Example 312 Equation of van der Waals Considers the attractive force between molecules (which he defined as a/v2)
a ( p + 2 )(VM  b) = RT VM a,b are constants characteristic of the particular gas, Vm = v/n) is the molar volume, R is the universal gas constant Modifications and Improvements Clausius (1880) Berthelot (1889) Dieterici (1899) Wohl (1927) Lorentz...
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This note was uploaded on 09/21/2008 for the course PTEC 502 taught by Professor Sue during the Spring '08 term at University of Texas Medical Branch at Galveston.
 Spring '08
 SUE

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