Thermophysics of metal alkanoates. Heat capacities and thermodynamic properties of potassiumn-hexanoate from temperatures from 6 K to 600 K. VIII

Abstract The heat capacity morphology of potassium n -hexanoate from T  =  6 K to T  =  350 K was determined by equilibrium adiabatic calorimetry and by differential scanning calorimetry (d.s.c.) from T  =  300 K to T  =  635 K. The curve was characterized by peaks assumed to be associated with solid  →  solid first order transformations at about T  =  252.5 K and T  =  325 K. A much sharper transition, also considered to be first order was observed at T  =  497 K. Fusion was observed at T  =  548 K. Tabulated experimental molar heat capacities and adjuvant smoothed thermodynamic functions derived by integration therefrom are presented at selected temperatures.