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Adsorption from Solution by R Ottewill (Eds.)

By R Ottewill (Eds.)

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1964). , 60, 1951. 24. I. (1967). "Phase Equilibrium and Surface Phenomena", Chapter VI, Chimia, Leningrad. 25. H. J. (1975). S. Faraday I, 71, 883. 26. Defay, R. and Prigogine, I. (1950). Faraday Soc, 46, 199. 27. Ono, S. (1947). , Tamura, M, and Kurata, M. (1951). Phys. Soc. Japan, 6>, 309; Ono, S. and Kondo S. (1960). I n "Encyclopaedia of Physics" (ed. Fliigge), Vol. 264, Springer, Berlin. 28. E. (1968). , 21, 827. 29. R. and Stecki, J. (1970). Phys. Letters, 5, 29. 28 EVERETT 30. H. H. (1968).

The 0-j_ play the same role as the chemical potentials of uncharged species and when they are included in the above formalism where appropriate no further modi­ fications are required. (3) Some of the derivatives in equations 12 and 25 require more variables to be held constant than is possible at equilibrium. To use these expressions when only equilibrium data are available it may be necessary to estimate these derivatives by arguing that some are negligible and that the others can be approximated by quantities which are obtainable solely from equilibrium data.

M S m m {f (x = A A m ? )} 1 / r =f (x = B m A ? ) (210 and £ is determined solely by r and the properties of the bulk solution phase. At x^ = £ , the model surface tension is given by equations ( 1 1 ) and ( 2 3 ) as m m Y M = C + (RT/a )ln{f (x S A A = n ")}* 1 A (25) £ )}VaT] m where C = Y ° - (BT/a )ln[{f (x = is a constant. This result indicates thar, at the model adsorption crossover point, the surface tensions are ordered according to the parameter t, increasing with t if f/^ A = n ) > 1 and decreasing otherwise.

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