The heat-transfer rate to the surroundings from a person at rest is about 100W. Supposed the ventilation system fails in an auditorium containing 2000 people. Assume there is no heat transfer through the walls.
A.) Determine the increase in internal energy of the system in the auditorium during the first 20 minutes after the ventilation system fails.
B.) Considering the auditorium and all of the people as a system, determine the increase in internal energy (MJ) of the system. How do you explain the fact that the temperature of the air increases?