Phenomenological Parameters in T.G.S.

Values and interpretation of phenomenological parameters of T.G.S. are obtained by a comparative study between power series expansion of the molecular-field approximation and the general expression of the thermodynamics theory. The values founds for ξ and ζ present a deviation in relation with those obtained using thermodynamics theory directly, but they give a very good picture for P s ( T ) in all range of temperature.