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Consider a class room of dimensions 5xx1...

Consider a class room of dimensions `5xx10xx3m^3` at temperature `20^@C` and pressure 1 atm. There are 50 peoples in the room, each losing energy at the average of 150 watt. Assuming that the walls, ceiling, floor and furniture perfectly insulated and none of them absorbing heat: The time needed for rising the temperature of air in the room to body temperature, i.e., `37^@C` will be (For air `C_P`=7R/2 . Loss of air to the outside as the temperature rises may be neglected)

A

420.25

B

415.55

C

411.35

D

408.35

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Consider a class room of dimesions 5 xx 10 xx 3m^(3) at temperature 20^(@)C and pressure 1 atm . There are 20 peoples in the room, each losing energy at the average of 150W . Assuming that the walls, ceiling, floor, and furniture perfectly insulated and none of them absorbing heat, how much time will be needed for rising the temperature of air in the room to body temperature, i.e., 37^(@)C ? For air C_(P) = (7)/(2)R . Loss of air to outside as the temperature rises may be neglected.

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