  A study of Universal thermodynamics is done in the frame work of RSII brane
model and DGP brane scenario. The Universe is chosen as FRW model bounded by
apparent or event horizon. Assuming extended Hawking temperature on the
horizon, the unified first law is examined for perfect fluid (with constant
equation of state) and modified Chaplygin gas model. As a result there is a
modification of Bekenstein entropy on the horizons. Further the validity of the
generalized second law of thermodynamics and thermodynamical equilibrium are
also investigated.
