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 cyc; smd4t3f;jmn le shown in the figure. Processes A → B and C → D are isothermal, while processes B → C and D → A are adimd3sjm nf4t;; abatic. 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 engin )46nnzlotk s/e 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 enginevnzx+t,o7 ak78r 4kag takes in 200 J of thermal energy and performs 50 J of work in each cycle. What is its effici 7 gt8kvkoxza,4 +7ranency?

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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 temperaj hkpeu7nwha *)x5 2t5ture 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 opercz) lvu*o5e(y s k-nvtj/+st9ate 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 that t,g j hbl6tri cg;6tx,rb*/9 pundergoes ljig p,*6t6 bgrr/xbc,9ht ;tthe cyclic 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 (o1t 3ym ,a ; 3dikwcbqpqke)9the working substance for a refrigerator that undergoes thek1iqcd;tbwke 9 oaqp,3(y) 3m cyclic 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 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 thee(bwf -vo7e0yk d4oqnxu8yuwht ojim01)9;1 reversible cyclic process (ABCA) shown in the PV diagram. Process A →B is adiabatic. 4o7v) (-o x1iouf8qhynm w 9k1 ; jwdb0te0ueyWhat is the efficiency of this engine?

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