From the point of view of universal thermodynamics, we con-sider our universe as a non-stationary gravitational system. Fur-ther, from cosmological viewpoint the homogeneous and isotropic FRW universe may be consideredas dynamical spherically sym-metric spacetime. Here we have only inner trapping horizon which coincides with the apparent horizon and it is possible to consider thermodynamical analysis using unified first law. Cai and Kim [21]derived the Friedmann equations with arbitrary spatial curvature