Efficiency, coefficient of performance and Carnot Cycle - 无忧得胜-网上国际课程 (5edu.win)

1#

03.47: A monatomic idea0sqf/ 7 f7jbzal7 4dyrjo8:f ul gas is used as the working substance for the Carnot cycle shown in the figure. Processes A → B and C → D are isothermal, while processes B → C and D → A are adiabatic. During process A → B, there are 400 J of work done by the gas on the surroundings. How much heat is expelled by the gas during pl7:8duf jqr4fzs/7aybj o7 f0rocess C → D?

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

95.24: The theoretical (Cat ir 2p9(fo*snfhq6+srnot) efficiency of a heat engine operating between $600^{\circ}C$ and $100^{\circ}C$ is:

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

98.07: A heat engine takes in 200 J of thermal e:xe8u yplnu wm:l0 ewewkz (l;5k 1g*,nergy and performs 50 J of work in each cycle. What is5ek pw0ell8m wuzule;w,g 1kn(yx * :: its efficiency?

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

13.41: An engine operates between a low te 8 nyui 7mgouql(vkn4-58wx5 tmperature of $273^{\circ}C$ and a high temperature of $546^{\circ}C$. What is the maximum theoretical efficiency of this engine?

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

06.44: A refrigerator must operate when the djfbg8w:m47 onb3.7v8aoic jap0i t0outside environment is at $22^{\circ}C$ to maintain an environment at $2^{\circ}C$ inside the refrigerator. During one cycle, the refrigerator expels 1200 J of energy to the outside environment while 400 J of work were done. What is the coefficient of performance of this refrigerator?

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

10.49: A monatomic ideal gas is the wgihi31ar i5 1hf0e1zo 8xu; ukorking substance for an engine that undergoes the cyclic process (ABCDA) shown in the PV diagram. Theg1 hk 1o0af3riii8;1 uzhx5ue processes are all isochoric or isobaric with pressures between $P_0$ and $2P_0$ and volumes between $V_0$ and $1.5V_0$ . What is the efficiency of this engine?

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

12.44: A monatomic ideal gas is the w* cksr.q.1nebp t:hc 8orking substance for a refrigerator that undergoes the cyclic process (ABCDA) sho8eh:kr.sc*1t qc npb.wn in the PV diagram. The processes are all isochoric or isobaric with pressures between $P_0$ and $2P_0$ and volumes between $V_0$ and 2$V_0$ . What is the coefficient of performance for this refrigerator?

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

17.50: A monatomic ideal gas undergoes the reveqn pfp(3vxo-tl g),pz54,i ic rsible cyclic process (ABCA) shown in the PV diagram. Process A →B is adiabatic. What is the efficieg(4z lpot5-xcqp n,v i)f,p3incy of this engine?

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