Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Molar heat capacity and thermodynamic properties of 1-cyclohexene-1,2-dicarboxylic anhydride [C8H8O3]

Lv, X.-C.[Xue-Chuan], Tan, Z.-C.[Zhi-Cheng], Di, [You-Ying], Shi, Q.[Quan], Sun, L.-X.[Li-Xian], Zhang, T.[Tao]
J. Chem. Thermodyn. 2004, 36, 9, 787-792
ABSTRACT
The molar heat capacity Cp,m of 1-cyclohexene-1,2-dicarboxylic anhydride was measured in the temperature range from T=(80 to 360) K with a small sample automated adiabatic calorimeter. The melting point Tm, the molar enthalpy DfusHm and the entropy DfusSm of fusion for the compound were determined to be (343.46? 0.24) K, (11.88?0.02) kJ /mol and (34.60? 0.06) J/K/mol, respectively. The thermodynamic functions [H(T) - H(298.15)] and [S(T) - S(298.15)] were derived in the temperature range from T=(80 to 360) K with temperature interval of 5 K. The mass fraction purity of the sample used in the adiabatic calorimetric study was determined to be 0.9928 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 its thermal decomposition.
Compounds
# Formula Name
1 C8H8O3 3,4,5,6-tetrahydrophthalic anhydride
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal
  • Crystal
  • Liquid
  • Gas
  • ADIACA:UFactor:4
  • 1
  • POMD
  • 1
  • Triple point temperature, K ; Crystal
  • Crystal
  • Liquid
  • Gas
  • ADIACA:UFactor:2
  • 1
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • SMALLAD:UFactor:2
  • 131
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • SMALLAD:UFactor:2
  • 8