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# PHYS102Quiz3 - PRACTICE QUIZ 3 1 Of the following heat...

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179 P RACTICE Q UIZ 3 1. Of the following heat engines, which has the highest efficiency? a. Hero’s engine b. a Carnot engine c. a car’s gasoline engine d. a truck’s diesel engine b 2. An adiabatic expansion refers to the fact that: a. no heat is transferred between a system and its surroundings. b. the pressure remains constant. c. the temperature remains constant. d. the volume remains constant. a 3. A gas expands at constant temperature from an initial volume of 0.040 m 3 and an initial pressure of 210 kPa until its pressure drops to 135 kPa. How much work is done by the system? a. 3.7 kJ b. 4.1 kJ c. 5.6 kJ d. 7.9 kJ a 4. What is the change in entropy ( S ) when one mole of silver (108 g) is completely melted at 961°C? (The heat of fusion of silver is 8.82 10 4 J/kg.) a. 5.53 J/K b. 7.72 J/K c. 9.91 J/K d. 12.10 J/K b 5. The efficiency of a Carnot engine operating between 100°C and 0°C is most nearly: a. 7%. b. 15%.

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PHYS102Quiz3 - PRACTICE QUIZ 3 1 Of the following heat...

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