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.Which of these processes is endothermic?

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Endothermic  → system gains energy

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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.

Which of these processes is endothermic?

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