Excess Enthalpies of Binary Mixtures of Propanediamine+Propanediol at 298.15 K

The molar excess enthalpies of 1,2- and 1,3-propanediamine+1,2- and 1,3-propanediol have been determined at 298.15 K by using a twin-microcalorimeter which requires each component liquid 1 to 1.5 cm³ for a series of runs over the whole range of mole fraction. All excess enthalpies are exothermic and large. An equilibrium constant K₁ expressed in terms of mole fractions and standard enthalpy of formation of 1:1 complex have been evaluated by ideal mixtures of momomeric molecules and their associated complexes. This revised version was published online in August 2006 with corrections to the Cover Date.