In this work1 tho thermal evolution of the chiral non-strange and strange condensates in the hadronic phase ia obtained from a second order relativistic virial expansion 2. In order to ensure the model independency of the approach, we use Chiral Perturbation Theory to describe the zero temperature interactions, which are needed in the second virial coefficient. This allows us to study the SU(2) 3 and SU(3) cases using the physical masses for the hadrons. In this way we observe a faster decrease of tho non-strange condensate when the number of flavors increases from 2 to 3. In terms of extrapolated melting temperatures it would imply roughly a T_m~(<(q-bar)q>SU(2)) -
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