Efficiency, coefficient of performance and Carnot Cycle

1#

03.47: A monatomic ideal gas is used as the )(qh3e8 asw ifworking substance for the Carnot cycle shown in the figure. Processes A → B aswq e)38ihfa (nd 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 o4sno5w )f-5p1znzoa 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 takesdft3gong l.g0v1 m-g/op,mupc- .5r-mhlp0 e in 200 J of thermal energy and performs 50 J of work in each cycle. Wha -hgmpmpour.-/cnd l0vlt pf0gg m o,.53g-1et 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 between a low temperature u1a *rxz ao.s 0t1mpb9of $273^{\circ}C$ 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 operattx7x:vq zmx gn7ida, qwo8.o 0-9rcl*e 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 under w;v.xso1 kk2+2atd pjgoes the cyclic process (ABCDA) shown in the PV 2 1ksd +vatpjw2.x ko;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 substance for a refrigerator tm63wd 1iao 9jehat undergoes the cywa9ije3 61d omclic 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 the reversible cyclic pr4+ q-mb9 qpvmyocess (ABCA) shown in the PV diagram. Process A →B is adiabatic. What is the efficiency of thi yq-mvq94p +mbs engine?

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