- 6. In this engine Q h = 1760 and Q c = 1142 . What is the change in entropy of

Question

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6. In this engine Qh = 1760 and Qc = 1142 . What is the change in entropy of the upper reservoir to two decimal places? What is the change in entropy of the universe? -5. The heat engine in the figure absorbs Qh =3283 joules of heat and ejects Qc = 1138 joules of heat. What is its efficiency to two decimal places? If the temperature of the lower reservoir is 270 K and the engine is a Carnot engine, what is the temperature of the upper reservoir to the nearest kelvin?6. In this engine Qh = 1760 and Qc = 1142 . What is the change in entropy of the upper reservoir to two decimal places? What is the change in entropy of the universe?

Explanation / Answer

dS = Qh/Th = 1760/600 = 2.933 J/K

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