  We consider a FRW universe filled by a dark energy candidate together with
other possible sources which may include the baryonic and non-baryonic matters.
Thereinafter, we consider a situation in which the cosmos sectors do not
interact with each other. By applying the unified first law of thermodynamics
on the apparent horizon of the FRW universe, we show that the dark energy
candidate may modify the apparent horizon entropy and thus the Bekenstein
limit. Moreover, we generalize our study to the models in which the cosmos
sectors have a mutual interaction. Our final result indicates that the mutual
interaction between the cosmos sectors may add an additional term to the
apparent horizon entropy leading to modify the Bekenstein limit. Relationships
with previous works have been addressed throughout the paper. Finally, we
investigate the validity of the second law of thermodynamics and its
generalized form in the interacting and non-interacting cosmoses.
