The thermodynamic properties of 5-ethylidenebicyclo[2,2,1]-hept-2-ene over the temperature range from T → 0 to 350 K

The temperature dependence of the heat capacity of 5-ethylidenebicyclo[2,2,1]-hept-2-ene in the vitreous, supercooled liquid, and liquid states was studied by adiabatic vacuum calorimetry over the temperature range 7-350 K with errors of -0.2%. The vitrification and vitreous state parameters, including the glass formation temperature T(g)degrees and the heat capacity increase Delta C(p)degrees (T(g)degrees) caused by devitrification, were determined, and the configurational and "zero" entropies S(conf)degrees and S degrees(0) were estimated. The experimental data were used to calculate the thermodynamic functions of 5-ethylidenebicyclo[2,2,1]-hept-2-ene (C(p)degrees(T), H degrees(T) - H degrees(0), p S degrees(T), and G degrees(T) - H degrees(0)) over the temperature range from T -> 0 to 350 K and the standard entropy of its C, formation from simple substances at 298.15 K, Delta(f)S degrees.