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monatomic gas, so is a constant, where
, giving For a 3 c) [5pt] If the process is closed by the isovolumetric process CA, it may be thought of as a
refrigerator. How much heat does the gas absorb from the surroundings in process CA?
[If you don’t have an answer to the previous part, assume 100 K.] 3. [15pt] Answer the following multiple-choice questions. It is not necessary to justify your
answer, but partial credit can be awarded for a partially-correct justification. (a) [3pt] If a process having efficiency 1/4 as an engine is reversible and run as a
refrigerator, its coefficient of performance will be
A. 2. B. 3. C. 4. D. 5. (b) [3pt] You are naked in the middle of a bare room with cold concrete walls. The air is still,
and a thermometer says the air temperature is above your body temperature, but you
feel cold, because
A. air is a poor thermal insulator and conducts heat from you r body to the cold walls.
B. convection carries heat from your body to the cold walls.
C. the walls are radiating coldnes...
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