An Outline of Energetics in Relation to the Movement of Materials Through a Two-Phased Solution System

Further Theoretical Considerations of Modes of Expression and Factors Possibly Concerned in the Movement of Materials Through a Two-Phased Solution System

“…Discussion of modes of expression In earlier articles, various terminologies have been used as means of expressing the factors concerned in solute and water movement (2,3,4,5,6,10,14,16,20,24). References 2, 3, 4, and 5 should be consulted in particular.…”

“…For any particular influence, ±k (f. -fi) (fe-fi)= RTIn (4) ai in which ae is the ratio of the effective molal compositions or activities of ai the constituent component whose escaping tendency is being considered. Further, diffusion pressures (in the restricted sense) of either component between solutions of a two-phased system may be expressed by P = AF = kl, (C. -Ci), (5) in which P is the diffusion pressure, in atmospheres; kb is a characteristic coefficient (5); and Q,e-Ci is the concentration difference of the component whose escaping tendency is in question, expressed in grams per liter of solution.…”

“…As with specific free energies, there may appear to be certain advantages or disadvantages to the use of the terms diffusion pressure (5,26) or diffusion pressure deficit (20) in the sense of FICK (12). Flux of materials in all natural systems, involves diffusion in part, this tendency being a func-tion of the relative concentrations of the constituent whose migration is in question.…”