Excess enthalpies of ethanolpropanal binary mixtures at 298.15 and 318.15 K

The excess molar enthalpies hmE of the ethanolpropanal system have been measured at 298.15 and 318.15 K by means of an isothermal flow calorimeter. The pressure-effect on the hmE values has been investigated in order to compare these data with low-pressure vapor-liquid equilibrium data previously reported for the ethanolpropanal system. Values for hmE are very exothermic. Mixtures at 298.15 K exhibit a minimum of approximately −7300 J mol−1 at a mole fraction close to 0.5. Mixtures at 318.15 K exhibit a minimum of approximately −5000 J mol−1 at a mole fraction close to 0.6. These values for hmE are similar to those previously found for the methanolpropanal mixtures.