1985•Chemical Engineering CommunicationsRequires access
A REDUCED VAPOR PRESSURE EQUATION BASED ON THE THEOREM OF CORRESPONDING STATES
XU ZHONG
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Abstract
A reduced vapor pressure equation based on the theorem of corresponding states is proposed in this work by the use of the third parameter to and the fourth parameter X. This equation yields an overall average absolute deviation of 1.09% for 111 normal fluids involving a total of 6968 vapor pressure data points, and 0.67% for 20 polar fluids involving a total of 1516 data points, respectively. A relationship of estimating acentric factors is obtained by applying the reduced vapor pressure equation at the normal boiling point. This relationship is very accurate for the prediction of the values of the acentric factor