Abstract
The thermodynamic equations developed by us for analyzing titration calorimetry of surfactant solutions were summarized and applied to the following cases: titration by pure surfactant liquid, aqueous solution of a surfactant, and that of a binary surfactant mixture. The partial molar enthalpy accompanied by dissolutions of surfactants into water and that by micelle formation were evaluated by using the derivative of the enthalpy of mixing with respect to the surfactant concentration. The phase diagram of micelle formation was used for estimating the partial molar enthalpy changes of micelle formation of a surfactant mixture.
