6402

5976

كارشناسي ارشد

شيمي فيزيك

اصفهان: دانشگاه صنعتي اصفهان، دانشكده شيمي

1390

ده،60ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

بيژن نجفي، غلامعباس پارسافر

حسين فرخ پور

28/9/90

عزت كشاورزي، يوسف غائب

شيمي

ID5976

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Aplication of the principle the corresponding states in the equation of state EOS III of dense fluids Somayeh Kazemi s kazemi @ch iut ac ir Department of Chemistry Isfahan University of Technology Isfahan 84156 83111 I R Iran Degree M Sc Language Farsi Prof B Najafi Email najafi@cc iut ac ir Prof G A Parsafar Email parsafar@sharif edu Abstract Although liquids and dense fluids are complicated on a molecular scale they show a number ofsimple regularities some of which have been known for years without any theoretical basis In 1993Parsafar and Mason developed a new regularity for dense fluids and called it Linear IsothermRegularity which is called EOS I in this thesis The regularity is that the quantity Z v 2 islinear in 2 where v is the molar density Z is the compressibility factor and defined as Pv RT where v is the molar volume R and T are the gas constant and Kelvin temperaturerespectively Further investigations showed that EOS I does show some deviations fromexperiment for extremely nonspherical molecules It was also shown that Z v 2 versus 2isotherms for long chain organic compounds show significant deviations from linearity Moreover EOS I cannot fit the data for the simple fluid neon if a wide density range is considered Also theapplication of EOS I to alkali metals more specifically liquid cesium suffers within the densityrange where the metal nonmetal transition occurs In 2009 Parsafar and his coworkers developed a simple functional form for a general equationof state based on an effective near neighbor interaction of an extended Lennard Jones 12 6 3 type C T C T C T N z 1212 6 6 3 3 U r 2 r rand tested against experimental data for a wide variety of fluids and solids Using argumentsanalogous to those of Parsafar and Mason in deriving EOS I they obtained the equation of state f Z v 2 e g 2 which is called EOS III in this thesis because it builds on earlier linear regularities EOS I andEOS II which perform well for particular materials Three constants e f and g are functions oftemperature and in general all three functions to contain contributions from both the internal andthermal pressures It gives an excellent representation of isotherms for widely differing materialsand over wide ranges of density In this thesis the accuracy of the prediction of the compressionfactor of fluids monatomic and polyatomic fluids hydrocarbons and refrigerants via EOS III is G for each isotherms over a wide temperature density range evaluated by calculation of E FThis accuracy was also checked by using the temperature dependency E F and G and shownthat the level of the accuracy is not changed significantly The main limitation of EOS III is the

بيژن نجفي، غلامعباس پارسافر

حسين فرخ پور

عزت كشاورزي، يوسف غائب