Problem 4.11 - Problem 4.11 [Difficulty: 2] Given: Data on...

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Problem 4.11 [Difficulty: 2] Given: Data on heat loss from persons, and people-filled auditorium Find: Internal energy change of air and of system; air temperature rise Solution: Basic equation QW E = Assumptions: 1) Stationary system E = U 2) No work W = 0 Then for the air UQ = 85 W person 6000 × people 15 × min 60 s min × = U 459 MJ = For the air and people surroundings = 0 = The increase in air energy is equal and opposite to the loss in people energy For the air = but for air (an ideal gas)
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This note was uploaded on 10/19/2011 for the course EGN 3353C taught by Professor Lear during the Fall '07 term at University of Florida.

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