Apparent molar heat capacities of aqueous solutions of 1-propanol, butane-1,4-diol, and hexane-1,6-diol at temperatures from 300 K to 525 K and a pressure of 28 MPa

Abstract The heat capacities of dilute aqueous solutions of 1-propanol, butane-1,4-diol, and hexane-1,6-diol have been measured at 300 K T p = 28 MPa. Extrapolation to infinite dilution gave values for C p,2 ∞ . Literature values of (∂ 2 V 2 ∞ /∂ T 2 and C p,2 ∞ at p = 0.1 MPa were used to calculate C p,2 ∞ at p = 28 MPa. After subtracting the heat capacity of a point mass, the remaining heat capacity was successfully decomposed into functional group contributions at all temperatures. The resulting values for the heat capacity contributions of the CH 2 , CH 3 , and OH groups allow reasonably accurate predictions of the heat capacities of all compounds composed of these groups in this temperature range.