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The temperature at which solution is just complete for a known concentration of C.I. Disperse Yellow I dispersion in the presence of a surface active agent was measured using a hot‐stage microscope. cell. A range of solubilities and temperatures were then obtained by varying the dye and surface active agent concentrations of the dispersions. It was found that derived values of solution enthalpies decreased with increasing concentration of dispersing agent.
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GHANEKAR et al. (1976) studied this question.
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