  A method is developed to consistently satisfy the Gibbs equilibrium
conditions between the quark-gluon and hadronic phase although each phase has
been formulated in separate grand canonical partition function containing three
quark flavours. The sector in the space of thermodynamic variables where the
transition takes place is restricted to a curve, according to the phase diagram
of QCD. The conservation laws of quantum numbers are also imposed on the
transition curve. The effect of the inclusion of the newly discovered
pentaquark states is considered. The freeze-out conditions of S+S, S+Ag (SPS)
and Au+Au (RHIC) are found compatible with a primordial QGP phase, but the
conditions indicated by Pb+Pb (SPS) are not.
