Problem: The contents of the closed box in each of the illustrations  represent a system, and the arrows show the changes to the system during some process. The lengths of the arrows represent the relative magnitudes of q and w.For which process, if any, is there a net gain in internal energy?

FREE Expert Solution

ΔE = q + w


(i)

loses heat → - q

compress work → +w 

w > q


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Problem Details

The contents of the closed box in each of the illustrations i) q out and w in. ii) w in. iii) q in and w out. represent a system, and the arrows show the changes to the system during some process. The lengths of the arrows represent the relative magnitudes of q and w.

For which process, if any, is there a net gain in internal energy?

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