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 1:qfcpi8k;7 mdm28w nfx( odbcycle 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 process C1b 2m7 ifoq :nd;xdfcmkw8 (p8 → 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 (Carnotf2(3 v60np him sbg 9.ebzv5zdd(8 mxq) 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 energy and performs 50 J of work r6i3vbnp6n2 k2o) ej min each cycle. What is its efficiencn6no 3pb ikjv 226r)emy?

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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 bk16ks-za t 6na q6jh) i+r+yxz8f( stdetween 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 operalpip1er q,l ph. +z5+cx.u s8nte 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 s fl:pqa8 01gekubstance for an engine that undergoes the cyclic process (ABCDA) shown in the PV diagram. The processes are all isocho8ql1agfp0k :e ric 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 substance for a refriw:g7e8 kyhp rpd+whs( z.m9s1gerator that undergoes the cyclic process (ABCDA) shown in the PV diagram. The processes are all isochoric or isobaric9ps:hws8gre yz+m. 7 p hwd1(k 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 (ABCA) shexw8;ug8 n3 deown in the PV diagraee8w;3n 8gxdu m. Process A →B is adiabatic. What is the efficiency of this engine?

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