Premium
Generalized treatment for the vapor pressure behavior of polar and hydrogen‐bonding compounds
Author(s) -
GomezNieto Mateo,
Thodos George
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.5450550414
Subject(s) - polar , vapor pressure , hydrogen bond , range (aeronautics) , vapour pressure of water , linear regression , water vapor , thermodynamics , chemistry , absolute deviation , materials science , mathematics , statistics , physics , organic chemistry , molecule , composite material , astronomy
The vapor pressure behavior of 25 polar compounds, including water and a number of alcohols, has been analyzed and subjected to a generalized treatment using the relationship,\documentclass[article]\pagestyle[empty]\begin[document]$$ \ln \,\, P_R = \alpha + \frac[\beta ][[T_B^n ]] + YT_R^\tau $$\end[document]for a total of 1343 experimental measurements presented in the literature and covering the range included between their respective triple points and critical points. For each of these compounds, the parameters of this equation were established using a nonlinear regression numerical technique. The parameters resulting from this regression reproduce vapor pressures for all these polar compounds with an average deviation of 0.44 percent (1343 points). To extend the application of this vapor pressure relationship, the original parameters of these polar substances were correlated with their respective basic physical properties M, T c , P c and T b . The resulting generalized parameters reproduce vapor pressures with an average deviation of 1.44 percent (1343 points) for all these polar and hydrogen‐bonding compounds. This generalized correlation can be applied for the reliable prediction of vapor pressures for polar substances for which inadequate information is available.