Abstract

Abstract Measurements were made of the solubility vs. temperature curves of water in normal alkane derivatives: alkanols, alkylamines, and alkanoic acids. The solubility of water increases monotonically with an increase in the temperature in alkanols and alkanoic acids, while it decreases in alkylamines. The solubility is so great that it often exceeds 1/2 in the mole fraction scale. Phase diagrams were constructed by combining such solubility curves with the solubility curves of these substances in water. The heat of solution at an infinite dilution vs. the temperature for 1-butanol in water is obtained by taking account of the activity coefficient of 1-butanol in its own phase.

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