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Student Name/N.- Student Name Number 10. (3 pts) An automobile engine that burns gasoline has been engineered to have a relatively high efficiency of 22%.
Student Name/N.- Student Name Number 10. (3 pts) An automobile engine that burns gasoline has been engineered to have a relatively high efficiency of 22%. While a car is being driven along a road on a long trip, 14 liters of gasoline are consumed by the engine. Of the 14 liters, how much gasoline was used in doing the work of propelling the car? a) 14 liters b) about 11 liters c) about 8 liters d) about 3 liters P 3000 Pa One mole of ideal gas in a cylinder is initially at 1000 Pa and 1 m. 1) It is taken to a second state by both heat and work transfer as shown in the figure. 18000 J of heat is given to the system from the surroundings and the system does 6000 J of expansion work during this process. 1) Then as the system returns to the initial state the surroundings does 3000 J of compression work on the system. Cp= 5/2R, C = 3/2R, R=8.3144621 m.Pa/mole.K, ) 1000 Pa 1 m3 3 m V 11. (5 pts) What is the heat transfer during the second process? a) -3000) b) -6000 c) -9000 d) -15000 12. (5 pts) What is the temperature of the ideal gas in the initial state? a) 298 K b) 240 K c) 120 K d) 60 K 13. (5 pts) What is the temperature of the ideal gas in the second state? a) 298 K b) 641 K c) 1082 K d) 1500 K 14. (5 pts) What is the entropy change of the system during the state change from 1 to 2 ? a) 7.8 m?.Pa/K b) 15.6 m.Pa/K c) 31.3 m?.Pa/K d) 62.6 m.Pa/K
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