Hammond-Stokes

One attempt to improve the agreement with experimental data is to use Hammond-Stokes relation in which the product D,Ti2 is plotted against the molar volume ratio of solvent to solute Vr. The slope is influenced by the following few factors, namely,... 

Figure 2.2.2. Hammond-Stokes plot for diffusion of iodine and carbon tetrachloride in various solvents at 298.15K. 0, . D T 2) D 1l2 at the Stokes Emstem limit. Perpendicular lines connect two or more...

Nakanishi, K. (1978). Prediction of diffusion coefficient of nonelectrolytes in dilute solution based on generalized Hammond-Stokes plot. Ind Eng. Chem. Fundam., 17,253-256. Quayle, O. R. (1953). The parachors of organic cottqmunds. An interpretation and catalogue. Chem. Rev., 53,439-589. 

For benzene solution, kMta calculated from this equation is 1 x 1010 liters/mole-sec. Actually Hammond used a formulation<3,4) that gave fcdiffn = 2 x 109 liters/mole-sec. This is probably a more realistic value than that calculated from the Stokes-Einstein equation and will be used for this discussion. 

CC Laboratories, Dorcas Lane, Stoke Hammond, Milton Keynes, MK 17 OEA (see Mediatech, Inc.). 

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