A well-insulated 4-m x 4-m x 5-m room initially at 10°C is heated by the radiator of a steam heating system. The radiator
has a volume of 15 L and is filled with superheated vapor at 200 kPa and 200*C. At this moment both the inlet and the exit
valves to the radiator are closed. A 120-W fan is used to distribute the air in the room. The pressure of the steam is
observed to drop to 100 kPa after 40 min as a result of heat transfer to the room. Assuming constant specific heats for air
at room temperature. Use data trom tables.
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