Composition and thermodynamic properties of SF6-C-(C2F4)n-CaF2-Cu-W reacting mixtures

The composition and thermodynamic properties of products of the reaction SF6 + a(1) C + a(2)C(2)F(4) + a(3)CaF(2) + a(4)Cu + a(5)W were determined for the values of parameters a(1), a(2), a(3), a(4) and a(5) greater than or equal to 0 in the pressure range 0.1-10 MPa and the temperature range 298.15-50 000 K. Reaction products for lower temperatures in the region considered form an ideal heterogeneous system in the state of thermodynamic equilibrium at constant temperature and pressure. The properties of a heterogeneous system are affected by phase transitions in the system and therefore attention is paid to the occurrence of condensed phases in the system in dependence on temperature, pressure and values of the parameters a(1), a(2), a(3), a(4) and a(5). The results are compared with data published so far by other authors, who usually assume that the system of products is gaseous. Among the many thermodynamic properties, the values of the specific heat capacity at constant pressure are given in particular.