PCHEMCONCEPTS_Overall

Liquid vapor and liquidvapor and supercrical fluid

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Unformatted text preview: Interac;ons, Origin of Interac;ons (electrosta;c forces electrons- nuclei, instantaneous dipoles) •  Rela;onship between departure from ideal gas behavior, magnitude of Vm and magnitude of the average intermolecular distance. (Large intermolecular distances ó༏ large Vm (large T and/or low p) ó༏ ideal gas behavior). Day #5: Fall 2011 •  Compression Factor Z = PVm/RT = Vm/Vm(ideal) –  Z = 1 Ideal Behavior –  Z > 1 Repulsive Forces Dominate (high T or high P) –  Z < 1 Agrac;ve Forces Dominate (low T, intermediate P) •  Virial Equa;on of State, Virial Coefficients (second, third, etc...) •  Boyle’s Temperature TB where B(T) = B’(T) = 0. •  Compression of Gases, Isotherms. •  Liquefac;on of Gases, P vs. V diagrams, Binodal or Coexistence Curve. Liquid, Vapor and Liquid+Vapor and Supercri;cal Fluid Regions. Day #6: Fall 2011 •  Liquefac;on of Gases, P vs. V diagrams, Binodal or Coexistence Curve. Liquid, Vapor and Liquid+Vapor and Supercri;cal Fluid Regions. Isothermal Compressibility, κT Thermal Expansion, α •  Cri;ca...
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