THE THERMODYNAMIC PROPERTIES OF BENZO[B]THIOPHENE

Measurements leading to the calculation of the standard molar thermodynamic properties for benzo[b]thiophene(g) (Chemical Abstracts registry number [95-15-8]) are reported. Experimental methods included adiabatic heat-capacity calorimetry, comparative ebulliometry, inclined-piston gauge manometry, and differential-scanning calorimetry (d.s.c.). The critical temperature and critical density were determined with the d.s.c., and the critical pressure was derived. Standard molar entropies, enthalpies, and Gibbs energies of formation were derived for the gas for selected temperatures between 260 K and 750 K. These values were derived by combining the reported measurements with values published previously for the enthalpy of combustion, the enthalpy of fusion, and the entropy and enthalpy of the liquid at the triple-point temperature. Measured and derived quantities were compared with available literature values. © 1991 Academic Press Limited All rights reserved.