# 3. A student living in a 4-m X 6-m X 6-m dormitory room turns on her...

3. A student living in a 4-m X 6-m X 6-m dormitory room turns on her 150-W 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 win- dows are tightly closed and disregarding any heat trans- fer through the walls and the windows, determine the tem- perature in the room when she comes back 10 h 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. Answer 58.2 C il ROOM 4mx6m×6m Fan

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