Excess enthalpies of five pentanol isomer + n-heptane systems measured at 303.15 K and a model describing the behavior

Experimental excess enthalpy data are reported for mixtures of n-heptane with five pentanol isomers: 1-pentanol, 2-pentanol, 3-methyl-1-butanol, 3-methyl-2-butanol and 2-methyl-2-butanol. The data were obtained using isothermal flow calorimetry and are compared with previous studies. These new data are represented by a model that combines the physical interactions of the Scatchard–Hildebrand regular solutions model with classical hydrogen bonding of the Kretschmer–Wiebe model. The model includes an adjustable parameter that reflects physical interactions and a self-association equilibrium constant that represents hydrogen bonding.