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9. A Carnot engine works between two heat reservoirs at temperatures TH = 500 K and...

9. A Carnot engine works between two heat reservoirs at temperatures TH = 500 K and TL = 350 K. If it is used as a refrigerator (working in reverse) between the same two reservoirs, how much energy is required (as work) to remove 1600 Jof heat from the refrigerator?

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Answer #1

Concept - using Carnot’s engine as refrigerator we find the required work as shown below

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