The chiral-symmetry-restoring phase transition in a model with dynamical spontaneoussymmetry-breaking is discussed qualitatively, making use of an approximation method. The selfconsistency equation of the model is established. The condensation and mass of fermions as well as the temperature or density dependence of energy density and specific heat are obtained. It turns out that, in this approximation, the chiral-phase-transition is second order at zero chemical potential and finite temperature; and the transition is first order for both cases at finite temperature and density and at zero temp...
