A Moradzadeh - Department of Chemistry, Payme Noor University, Urmia, Iran
S.A Razavizadeh - Department of Chemistry, Payme Noor University, Shiraz, Iran

In this study Redlich–Kwong equation of state is developedfor calculation PρT propertiesof some ionic liquids. This equation of state isbased on the generic Redlich–Kwong equation of state in whichthe parameters of this equation of state are dependent of density andtemperature. In order to improve the predictivepower of the mentioned equation of state for calculation of the density of ionic liquids,modifications on theparameters of this equation of state have been considered. The ionic liquids under consideration in this workincludethecation:imidazoliumandanions: Tetrafluoroborate, Thiocyanate, Trifluormethanesulfonate, Ethylsulfat, bis (Trifluoromethylsulfonly)-imideand Hexafluorophosphate. We will see thatthe comparison of predicted densities from the modified equation of state andexperimental data shows high ability of this equation in predicting PρT properties of ionic liquids. The overall average deviation percentof the calculated density of ionic liquids obtained by this equation of state is 0.08 %.

Equation of State; Ionic Liquids; Density