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quiz3

# quiz3 - Exam Name MULTIPLE CHOICE Choose the one...

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Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A reversible heat engine operates between T c = 264 K and T h = 412 K. What is its efficiency? A) 0.56 B) 1.56 C) 0.64 D) 0.36 1) 2) A Carnot engine operates between a high temperature reservoir at 463K and a river with water at 285K. If it absorbs 3200J of heat each cycle, how much work per cycle does it do? A) 1230 J B) 1981 J C) 1219 J D) 1970 J 2) 3) A 1220 kg sample of water at 0 degree Celsius is cooled to -29 degree Celsius, and freezes in the process. How much heat is liberated? (For water Lf=334 kJ/kg and Lv=2257 kJ/kg. The specific heat of ice is 2050 J/(kg K).) A) 138,000 kJ B) 335,000 kJ C) 480,000 kJ D) 556,000 kJ 3) 4) A gas is initially at (18 Pa, 10 m^3) and expands to (26Pa, 15m^3). The minimum amount of pressure the gas can be under is 7 Pa, and the maximum pressure the gas can be under is 50 Pa. Find the minimum amount of work that can be done by the gas in going from its initial state to

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quiz3 - Exam Name MULTIPLE CHOICE Choose the one...

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