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

1#

03.47: A monatomic ideal gas is used;ztzh6c nx-:h(cq8ecw hui6 3 as the working substance for the Carnot cycle shown in the figure. Processes A → B and C → D are isothermal, while proc:e6i 6xcwtchhn z 8q- ;c3h(uzesses 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 process 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 (Carnot) efficiency o;cx2 5fklk:fz f 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 energy and performs 50 J tor) 3-b n:ifyp0j/g k. 7jk 3czsx2jjof work in each cycle. What is its effici iyskgfz2obnr3.jj:xc0)t -j 37k / jpency?

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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 betwex2+izps rmejq7g: t- 4q fhk 8+.f.qacen a low temperature 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 outside environment is at 9a1zzmwf) 7hm $22^{\circ}C$ 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 idealpr8+aeph a83h gas is the working substance for an engine that undergoes the cyclic process (ABCDA) shown in the PV diagram. The processes are all isochoric or isobaric with 8pa38+ahpr h epressures 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 wor8od2)q6rtat tking substance for a refrigerator that undergoes the cyclic process (d)q 6t 2a8otrtABCDA) shown 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 revl3j/ q 0p7sq,e vo+u(/t / id1-uthzhrtsk vr0ersible cyclic process (ABCA) shown in the PV diagram. Processo- ets+z, k(7/hluqj t3q vuhrt/siv10 prd0/ A →B is adiabatic. What is the efficiency of this engine?

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