The Heat of Formation of Binary Liquid Solutions from Their Liquid Components

摘要

It is pointed out that an equation giving the relation of the heat of formation per mol of liquid solutions from their liquid components, to temperature and composition can be used as the foundation equation for their thermodynamical theory. The empirical equationDgr;Hequals;N1lpar;1minus;N1rpar;lpar;agr;plus;bgr;eggr;N1rpar;,in which Dgr;His the heat of formation per mol of the solution,N1is the mol fraction of one of the components of the binary solution, and agr;, bgr; and ggr; are constants or functions of temperature, is presented. There are two degenerate forms of this equation. (Eqs. (7) and (8).) There are listed values of agr;, bgr; and ggr; (or the values of the corresponding quantities in Eqs. (7) and (8)) for 59 solutions for one temperature and sometimes for several temperatures. It is noted that according to the data assembled in theInternational Critical Tables,some solutions composed of ``unassociated'' liquids present a behavior more irregular than those composed of ``associated'' liquids. It is suggested that this unexpected behavior may mean that some of these data are not as precise as they are indicated to be.