entropy of fusion

According to the temperature dependence of the solubility of 2-furyl-2-cyano-2 propenamide an enthalpy and an entropy of its dissolution in benzene, dymetylketon and iso-propanol were calculated. The heat of fusion (ΔfusН426,9 = 21,7 ± 1,1 kJ / mol) was determined by the method of differential and thermal analysis. The analysis of the influence of solvents on the entropy and enthalpy of mixing was conducted. 

The fusion temperature of 2-cyano-3-[5-(phenyl)-2-furyl]-2-propenamide and 2-cyano-3-[5-(4-methylphenyl)-2-furyl]-2-propenamide and their temperature dependence of dissolution in acetonitrile, benzene, dimethylketone, ethyl acetate and 2-propanol have been determined. According to the temperature dependence the differential enthalpies and entropies of the solution were calculated. Taking into account the entropies of fusion the entropies and enthalpies of mixing were calculated at 298 K.