Thermodynamics of SmCl3 and TmCl3: Experimental enthalpy of fusion and heat capacity. Estimation of thermodynamic functions up to 1300 K

Abstract

Heat capacities of solid SmCl3 and TmCl3 were measured by differential scanning calorimetry in the temperature range from 300 K up to the respective melting temperatures. The heat capacity of liquid SmCl3 was also investigated. These results were compared with literature data and fitted by a polynomial temperature dependence. The temperature coefficients were given. Additionally, the enthalpy of fusion of SmCl3 was measured. Furthermore, by combination of these results with the literature data on the entropy at 298.15 K, Sm0(LnCl3, s, 298.15 K) and the standard molar enthalpy of formation of ΔformHm0(LnCl3, s, 298.15 K), the thermodynamic functions were calculated up to T = 1300 K.