5. A student living in a 4 m x 6 m x 6 m dormitory room turns on her 150 watts fan before she leaves the room on a summer day, hoping that the room will be cooler when she comes back in the evening. Assuming all the doors and windows are tightly closed and disregarding any heat transfer through the walls and the windows, determine the temperature in the room when she comes back 10 hours later. Use specific heat values at room temperature, and assume the room to be at 100 kPa and 15°C in the morning when she leaves.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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5. A student living in a 4 m x 6 m x 6 m dormitory room turns
on her 150 watts fan before she leaves the room on a summer
day, hoping that the room will be cooler when she comes back
in the evening. Assuming all the doors and windows are tightly
closed and disregarding any heat transfer through the walls and
the windows, determine the temperature in the room when she
comes back 10 hours later. Use specific heat values at room
temperature, and assume the room to be at 100 kPa and 15°C
in the morning when she leaves.
Transcribed Image Text:5. A student living in a 4 m x 6 m x 6 m dormitory room turns on her 150 watts fan before she leaves the room on a summer day, hoping that the room will be cooler when she comes back in the evening. Assuming all the doors and windows are tightly closed and disregarding any heat transfer through the walls and the windows, determine the temperature in the room when she comes back 10 hours later. Use specific heat values at room temperature, and assume the room to be at 100 kPa and 15°C in the morning when she leaves.
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