An inventor submits a sketch of a new device. In every cycle it takes QH units of heat from a reservoir at TH=550K, delivers an equal amount of work W=QH to the surroundings, and finishes the cycle with no other interaction.
Critically examine the proposal.
(i) Identify the specific feature of the proposal that contradicts the second law of thermodynamics.
(ii) Classify the proposed device by name and give a reason for your classification.
(iii) Explain, without using mathematical calculations, what practical consequence would follow if such a device could actually be built.