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.

Answer

`411.3` second;