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Unformatted text preview: markowitz (am45362) – HW11 – distler – (56295) 1 This printout should have 24 questions. Multiplechoice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 2) 10.0 points A particular engine has a power output of 5 kW and an efficiency of 27%. If the engine expels 6341 J of thermal en ergy in each cycle, find the heat absorbed in each cycle. Answer in units of J 002 (part 2 of 2) 10.0 points Find the time for each cycle. Answer in units of s 003 (part 1 of 6) 10.0 points One mole of an ideal monatomic gas is taken through the cycle ABCA shown schematically in the diagram. State A has volume 0 . 0194 m 3 and pressure 1 . 26 × 10 5 Pa, and state C has volume 0 . 0481 m 3 . Process CA lies along the 294 ± 1 K isotherm. 10 20 30 40 50 60 70 2 4 6 8 10 12 14 16 “ PV ” diagram Volume ( × 10 − 3 m 3 ) Pressure( × 10 4 Pa) 2 9 4 ± 1 K B A C Find the temperature T b of state B. The molar heat capacities for the gas are 20 . 8 J / mol · K and 12 . 5 J / mol · K. Answer in units of K 004 (part 2 of 6) 10.0 points Determine the heat Q ab added to the gas dur ing process AB. Answer in units of J 005 (part 3 of 6) 10.0 points Determine the change Δ U ab = U b U a in the internal energy. Answer in units of J 006 (part 4 of 6) 10.0 points Determine the work W bc done by the gas on its surroundings during process BC....
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 Spring '08
 Kaplunovsky
 Physics, Thermodynamics, Energy, Entropy, Heat

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