The dissociation of ZnO(s) into zinc(g) and oxygen is a case of heterogeneous phase reaction
where the reaction rate follows Arrhenius reaction rate model. The activation energy and pre-exponential
factor [7] for the reaction are considered as 361 kJ/mol.K and 14 x 106 kg/m2s. In order to consider the
solid and gaseous phase separately two mixture materials created. The gaseous mixture is a combination
of zinc, oxygen and argon while the solid mixture consists of only granular ZnO particles. The thermo
physical properties of gases like thermal conductivity, viscosity and mass diffusivity are considered as a
function of temperature and follow kinetic theory.