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 theezt:c6a ehgm0y/ 84rz 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, thzt rhaegz46y8c/m:e 0ere 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) effi-a 3 ob5vl+unh94qto twx,gx7 ciency 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 pr-25d4zagjjeaa ;0o in 200 J of thermal energy and performs 50 J of work i5; 0-d 2razjj oapag4en each 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 operates betweenq/ytp:9j )iv hzny :sx3z* +sk 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 mg (x p 94dt)jqtknq rd)5:4mymust operate when the outside 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 working substance for an engine trny qym,m+ydhpd4itu) g :::,hat undergoes the cyclic process (ABCDA) shown in the PV diagram. The processes are all 4pd ,:ti::,hn)mrqydmy gy +uisochoric 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 substannv(5n -o ce)9r ir:uqtce for a refrigerator that undergoes the cyclic process (ABCDA) shown in the PV diagram. The processes are all isochoric o)ui-qctn rv (ne9:5r 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 reversible cyclic process (vsx q(hh(db9ij ys :74ABCA) shown in the PV diagram. Process A →B is adiabati (yh :jv 7(sb4hsxiqd9c. What is the efficiency of this engine?

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