Is it possible to transfer heat from a cold reservoir to a hot reservoir?
A) No; this is forbidden by the second law of thermodynamics.
B) Yes; this will happen naturally.
C) Yes, but work will have to be done.
D) Theoretically yes, but it hasn't been accomplished yet.

Question

Quizplus · Accepted Answer

According to the second law of thermodynamics, heat always flows from a hotter body to a colder body. However, heat can be transferred from a cold reservoir to a hot reservoir with the help of a heat pump or a refrigeration system, but this requires work to be done. The work input is required to move the heat against the natural flow of heat, i.e., from the cold to the hot reservoir. Therefore, the correct choice is C.

Is It Possible to Transfer Heat from a Cold Reservoir