Hayduk Laudie relationship

Hayduk-Laudie Relationship for Diffusion Coefficient in Water... 

Estimate the diffusivity of toluene in water at 25°C using the Wilke-Chang and the Hayduk-Laudie relationships. Compare your result with measured values in Table 3.7. 

Hayduk and Laudie (1974) developed a relationship specifically for water. They eliminated some of the solvent-specihc parameters from the Wilkie-Chang relationship, ehminated absolute temperature, and fit three coefficients in the relationship. The results were as follows ... 

As was the case for T>,a, the equations derived from the pure physical concepts are usually not the best numerical approximations of a given quantity, although they show which properties should enter into an empirical relationship. Othmer and Thakar (1953) derived the following expression with coefficients modified slightly by Hayduk and Laudie (1974) ... 

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