Tables 2-336 Ambrose Group Contributions for Critical Constants

TABLE 2 336 Ambrose Group Contributions for Critical Constants 

Ring compound increments (listed only when different from aliphatic values)  

Clncludes naphthenic alcohols and glycols but not aromatic alcohols such as xylenol. 

AVhen estimating the critical volumes of aromatic substances, use ring compound values, if available, and correct for double bonds. 

Property DIPPR recommended value Ambrose estimation % Difference 

R erence Joback, K. G., M.S. Thesis in Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Mass., June 1984. Classification Group contributions. 

Expected uncertainty 7 K ( 1 percent) for T 2 bar ( 5 percent) for P. Applicability Organic compounds. 

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