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We investigate the validity of the generalized second law of gravitationalthermodynamics in a non-flat FRW universe containing the interacting newagegraphic dark energy with cold dark matter. The boundary of the universe isassumed to be enclosed by the dynamical apparent horizon. We show that for thismodel, the equation of state parameter can cross the phantom divide. We alsopresent that for the selected model under thermal equilibrium with the Hawkingradiation, the generalized second law is always satisfied throughout thehistory of the universe. Whereas, the evolution of the entropy of the universeand apparent horizon, separately, depends on the equation of state parameter ofthe interacting new agegraphic dark energy model.

The generalized second law for the interacting new agegraphic dark energy in a non-flat FRW universe enclosed by the apparent horizon