  The work deals with the thermodynamical aspects of the cosmic substratum
which is dissipative in nature. For homogeneous and isotropic model of the
Universe this dissipative phenomenon is effective bulk viscous pressure in
nature and is related to the particle creation mechanism. Finally, the
stability criteria for the thermal equilibrium has been analyzed and are
presented in tabular form restricting the particle creation parameter or the
variation of the equation of state parameter with the volume.
