Excess molar enthalpies for binary mixtures of n-propanol, acetic acid, and n-propyl acetate at 313.15 K and atmospheric pressure

• Excess molar enthalpies, HE, data for the binary mixtures of acetic acid + n-propanol, acetic acid + n-propyl acetate, and n-propanol + n-propyl acetate have been measured at 313.15 K.
• The mixing processes are endothermic for acetic acid + n-propanol and n-propanol + n-propyl acetate, and acetic acid + n-propyl acetate presents S-shaped HE behavior.
• The experimental data have been correlated using Redlich–Kister equation and its modified version.
• The use of NRTL model gives satisfactory agreement between experimental and calculated HE data.

Excess molar enthalpies, HE, for the binary mixtures of acetic acid (AcOH) + n-propanol (n-PrOH), acetic acid (AcOH) + n-propyl acetate (n-PrOAc), and n-propanol (n-PrOH) + n-propyl acetate (n-PrOAc) have been measured at 313.15 K and atmospheric pressure using the Setaram C80 calorimeter. The experimental results are presented and correlated with the Redlich–Kister polynomial equation and its modified version. Modeling of the excess enthalpies has been performed using the UNIFAC and NRTL models.