Efficiency, coefficient of performance and Carnot Cycle

1#

03.47: A monatomic ideal gas is kupj7ufw :,-d used as the 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, there are 400 J of work done by the gas on tjuk:pfdw, -7 uhe 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 betwx/ -cmx4hrad( een $600^{\circ}C$ 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 perfoj ft tnqi.81t n,q5c:erms 50 J of work in each cycle. What is its e:8tntn,j.iq qf51t ce fficiency?

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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 ac)o; f i zja8ei+6sj;k 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/2c,g )ucse wc.ra 0e.x-os+ eaz2set 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 t7bzi/cf.-gxrh30j x bffpyi2 32gla-hat undergoes the cyclic process (ABCDA) 0y/ jbrp f3-bih7alx-2x2cgfzg3i.f 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 ideaeb9:(ub qf 8ptge ww+i dx:8hlt5//cvl gas is the working substance for a refrigerator that undergoes the cyclic process ct/ fe8 +e/quil:b w8tdw 5vpbh(:9xg(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 the reversir5.zq*ke1z emble cyclic process (ABCA) showq kz*1. rmeze5n in the PV diagram. Process A →B is adiabatic. What is the efficiency of this engine?

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