You have a PV diagram for a device going through a cyclic process forming a closed loop on the diagram. How can you tell from the diagram whether the device is acting as a heat engine and not as a refrigerator?
a. The loop is longer than it is high which means it is acting as a refrigerator.
b. The loop is higher than it is long which means it is acting as a refrigerator.
c. The loop proceeds clockwise which means it is acting as a heat engine.
d. The loop proceeds counterclockwise which means it is acting as a heat engine.
c
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