Premium
On the representation of liquid properties of pure polar compounds by means of a modified redlich‐kwong equation of state
Author(s) -
Chung W. K.,
Lu Benjamin C.Y.
Publication year - 1977
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450550612
Subject(s) - boiling point , thermodynamics , polar , enthalpy of vaporization , vapor pressure , chemistry , equation of state , vaporization , enthalpy , chemical polarity , boiling , organic chemistry , molecule , physics , astronomy
The temperature‐dependent parameters ω a and ω b 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 T r . To demonstrate the applicability of the resulting correlation, the values of ω a and ω b 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.