Critical Phenomena in the Cyclohexane-Aniline System

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Abstract
Measurements have been made on the transition temperatures between one‐phase and two‐phase conditions in the cyclohexane‐aniline system and on the densities of the coexisting phases, using an improved temperature control. The region of extreme cloudiness or wet fog, where the meniscus, if present, cannot be seen, and where density measurements are difficult because the density float cannot be seen, was investigated by means of a technique suggested by Zimm. In this procedure the temperature was raised, without stirring, to clear the wet fog without removing any density gradients which might have formed. The previous results of Rowden and Rice and Atack and Rice have been substantiated, and it is concluded with stronger evidence that there is an appreciable range of critical concentrations over which the transition temperature is constant.

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