(2) A well-insulated 106 m³ room initially at 3°C and 88 kPa is heated by the radiator of a steam heating system. The radiator has a volume of 35 L and is filled with superheated vapor at 300 kPa and 250°C. At this moment both the inlet and the exit valves to the radiator are closed. A 100-W fan is used to distribute the air in the room. The pressure of the steam is observed to drop to 100 kPa after 148 min as a result of heat transfer to the room. Assuming constant specific heats for air at room temperature and that the room is perfectly sealed, the temperature rise will be:

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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(2) A well-insulated 106 m³ room initially at 3°C and 88 kPa is heated by the
radiator of a steam heating system. The radiator has a volume of 35 L and is
filled with superheated vapor at 300 kPa and 250°C. At this moment both the
inlet and the exit valves to the radiator are closed. A 100-W fan is used to
distribute the air in the room. The pressure of the steam is observed to drop to
100 kPa after 148 min as a result of heat transfer to the room. Assuming
constant specific heats for air at room temperature and that the room is
perfectly sealed, the temperature rise will be:
Fan
Steam
radiator
(а) 8.3 К
(b) 9.2 К
(с) 10.4 К
(d) 11.2 K
(е) 12.5 К
Transcribed Image Text:(2) A well-insulated 106 m³ room initially at 3°C and 88 kPa is heated by the radiator of a steam heating system. The radiator has a volume of 35 L and is filled with superheated vapor at 300 kPa and 250°C. At this moment both the inlet and the exit valves to the radiator are closed. A 100-W fan is used to distribute the air in the room. The pressure of the steam is observed to drop to 100 kPa after 148 min as a result of heat transfer to the room. Assuming constant specific heats for air at room temperature and that the room is perfectly sealed, the temperature rise will be: Fan Steam radiator (а) 8.3 К (b) 9.2 К (с) 10.4 К (d) 11.2 K (е) 12.5 К
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