Abstract
The values of thermodynamic functions of the following eight organic compounds under non-reacting conditions within the temperature range 298.15 – 550 K are given: N,N dimethylformamide, CHO · N(CH3)2; 4-nitro-1-chlorobenzene, Cl · C6H4 · NO2; sodiump-nitrophenoxide, NO2 · C6H4 · ONa; 1-methyl-2-pyrrolidone, 4,4′-dinitrodiphenyl ether, (NO2 · C6H4)2O; 4,4′-diaminodiphenyl ether, (NH2 · C6H4)2O; bis-(4-aminophenyl)methane, (NH2 · C6H4)2CH2; bis(4-maleic acidimidphenyl)methane, The relative enthalpy was obtained from calorimetric data by drop calorimetry. The heat capacity and relative entropy are functions derived from the foregoing. The equations of the temperature variation of the relative enthalphy were obtained by computer processing of the calorimetric data by the least squares method. The parameters of solid-liquid transitions were determined from the discontinuity of the temperature variation of the relative enthalpy.
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