Calorimetric investigation of NaI–alcohol interactions in alcohol + alcohol mixtures

Enthalpies of solution of sodium iodide in mixtures of methanol with ethanol, n-propyl alcohol and isopropyl alcohol have been measured at 298.15 K over the entire range of mixture compositions. Standard solution enthalpies exhibit maxima in the region of high n-propyl alcohol and isopropyl alcohol contents in the system, while in the case of the methanol + ethanol system the standard enthalpy has a monotonic character. Enthalpic NaI–alcohol pair-interaction coefficients for the systems under study have been calculated and analysed.