Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

The molar heat capacity Cp,m of 4-Methyl-4-cyclohexene-1,2-dicarboxylic anhydride was measured over the temperature range from T = 80 K to T = 361 K with a small sample automated adiabatic calorimeter. The melting point Tm, the molar enthalpy !/fusHm and the entropy!/fusSm of fusion for the compound were determined to be (335.54!A0.41) K, (17.67!A0.04) kJ!Amol-1 and (52.65!A0.04) J!AK-1!Amol-1, respectively. The thermodynamic functions [HT -H298.15] and [ST -S298.15] were derived in the temperature range from T = 80 K to T = 361 K with temperature interval of 5 K. The mass fraction purity of the sample used in the adiabatic calorimetric study was determined to be 0.9940 by using the fractional melting technique. The thermal stability of the compound was investigated by Differential Scanning Calorimeter (DSC) and Thermogravimetric (TG) technique, and the process of the mass-loss of the sample was due to the evaporation, instead of thermal decomposition.