A system is taken around the cycle shown, from state a to state b and then back

Question

A

system is taken around the cycle shown, from state a to state b and then back to state a. The absolute value of the heat transfer during one cycle is 7200 J.

a) Does the system absorb or liberate heat when it goes around the cycle in the direction shown in the figure? How can you tell?

b) What is the work W done by the system in one cycle?

c) If the system goes around the cycle in a counterclockwise direction, does it absorb or liberate heat in one cycle? What is the magnitude of the heat absorbed or liberated in one CCW cycle?

Explanation / Answer

a) absorbed

b) work = 7200 J    ( du =0)

C) LIBERATE     W = -7200J

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