Is thermodynamics of the universe bounded by event horizon a Bekenstein system?

AbstractIn this brief communication, we have studied the validity of the first law of thermodynamics for the universe bounded by event horizon with two examples. The key point is the appropriate choice of the temperature on the event horizon. Finally, we have concluded that universe bounded by the event horizon may be a Bekenstein system and Einsteinʼs equations and the first law of thermodynamics on the event horizons are equivalent