Abstract
In evaluating results of calorimetrical analysis of aqueous solutions using DSC, it is generally inadequate to use the usual method for pure materials, since the temperature of the solutions varies in wide range through the phase change process. In this study, the original method, in which the specific enthalpy of aqueous solution is expressed as a function of temperature and initial concentration, is proposed. Additionally, the formulation only using the properties of the solution was proposed and the functions of specific enthalpy were derived from the formulation. The functions were compared with the result obtained from DSC, using ethanol, ethylene glycol and Propylene glycol solutions as samples. Since these values agree well with each other, it is found that the function of specific enthalpy can also be obtained from the formulation. Finally, the advantages of this evaluating method for practical use were discussed.
