Isentropic quark hadron phase boundary and strangeness enhancement

We develop a phenomenological equation of state for the quark-gluon plasma containing n(f) flavors when the entropy per baryon ratio remains continuou s across the phase boundary and thus derive a generalized expression for th e temperature and baryon chemical potential dependent bag constant. The pha se boundaries are obtained for an isentropic quark-hadron phase transition after using Gibbs' criteria and the transition to an ideal QGP from the sol ution of the condition B(mu,T) = 0. The variation of critical temperature T -c with n(f) and the temperature variation of the quantity (epsilon - 4P)/T -4 which measures the interaction present in QGP are obtained and compared with the results from lattice calculations. Finally we obtain the strange p article ratios on the two phase boundaries which will be useful in identify ing deconfined and/or ideal QGP formation in the heavy-ion experiments.