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From Hot to Cool: The Second Law of Thermodynamics

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A. Change in Entropy = Delta S = Q/ T = 25/(20+273) = 0.06826 J/K

B.Change in Entropy = Delta S = Q/ T = -25/500 = -0.05 J/K

C. Change in Entropy = Delta S = Q/ ...

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Example for Laws of Thermodynamics

During the first oil crisis of the early 1970s, a business entrepreneur placed an expensive full-page advertisement in the New York Times, appealing to "the ingenuity of the American people." He offered a cash reward to any inventor who could "raise the temperature of a metal rod by cooling a second rod" and then "generate power by tapping the difference in temperatures."

Use your knowledge of thermodynamics to explain why nobody ever won the reward. Be specific.

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