| Abstract: | The temperature-dependent parameters ωa and ωb of the Redlich-Kwong equation of state were evaluated from saturated liquid volumes and vapor pressures for three polar compounds, water, ammonia and sulfur dioxide, and then correlated in terms of Tr. To demonstrate the applicability of the resulting correlation, the values of ωa and ωb computed from these equations were used to evaluate the liquid properties of these compounds, such as vapor pressures and liquid volumes at saturation, and the heat of vaporization at the normal boiling point. In addition, the enthalpy departures of liquid water as well as the liquid volumes of compressed water were calculated. The results obtained from the proposed correlations are generally superior than those obtained from the equations of state recently proposed by Fuller, and Peng and Robinson. |
