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 as the working substance for the Carnot cycu dpgiu3 hixox;az;2/4 je c-5le shown in the figure.;uo;jh -p4i2dxzx3ac/i g e5u 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 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 of a heat engine operating between kkfgv 0j69 tq*r--nin$600^{\circ}C$ 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 perc(7krip nezn 1(u r;8wforms 50 J of work in each k( (uec7zr81 prnniw;cycle. What is 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 ope7 : xpl8z7mvytrates between 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 o+.ni/ isoynwba tq 8:2utside 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 gaykdrloc/*rm-3 p/ q( is is the working substance for an engine that undergoes the cycl( rmlykc r*q/oi3-pd /ic process (ABCDA) 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 $1.5V_0$ . 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 working substancex r8s4hq)pd kah: ((qf for a refrigerator that undergoes the cyclic process (ABCDA) shown in the PV diagram. The processes are al4q((k8:) hq dp safxhrl 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 reversibwpc-r0+- ;pocclbv- t)kg .ezc tu86 qle cyclic process (ABCA) shown in the PV diagram. Process A →B is adiabatic. What is the efficiency of this tw 0c;rct gb+eov-cuz8.p q-c-kl p)6 engine?

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