  We present here the computation of electrical and thermal conductivity by
solving the Boltzmann transport equation in relaxation time approximation. We
use the $q$-generalized Boltzmann distribution function to incorporate the
effects of non-extensivity. The behaviour of these quantities with changing
temperature and baryochemical potential has been studied as the system slowly
moves towards thermodynamic equilibrium. We have estimated the Lorenz number at
NICA, FAIR and the top RHIC energies and studied as a function of temperature,
baryochemical potential and the non-extensive parameter, $q$. We have observed
that Wiedemann-Franz law is violated for a non-extensive hadronic phase as well
as for an equilibrated hadron gas at high temperatures.
