The machine cannot cool the room because the heat addition will make the room warmer
In this problem, the inventor’s device called “in room air conditioner” is an air-conditioner type heat engine, andit will remove heat from the room.
The machine made by the inventor is named an “in-room air conditioner.” It is a huge box placed in the middle of the room. It is connected to the power outlet through a cable.
By the law of thermodynamics, it can be said that there should be a greater temperature exhaust heat, which should be larger than the removed heat. In this condition, the addition of heat to the machine will make the room warmer.
An ideal monatomic gas expands slowly to twice its volume (1) isothermally; (2) adiabatically; (3) isobarically. Plot each on a PV diagram. In which process \(\Delta U\) is the greatest, and in which is \(\Delta U\) the least? In which is W the greatest and the least? In which is Q the greatest and the least?
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