Efficiency, coefficient of performance and Carnot Cycle

1#

03.47: A monatomic ideal gas is used jsh qkq)9/l9:v ab) veas 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 ad)s9bvvajhqk/eql 9: )iabatic. 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 engine operating bpg)fb-.( pkpk/ )kvbk x86zhp etween $600^{\circ}C$ 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 workx-yn / ))xthit in h/xxynt )-)tieach 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 between a low tempfci 8o/8sdsc7c6x p,zerature 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 p2x b4mw7yegqk : m9ur 9jcm1(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 ide40ilyb)/g 5nxqj2 ls dal gas is the working substance for an engine that undergoes the cycl5ylqd gbl)xn 20s i4j/ic 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 the working substance for a refrigc *ei7,peoe4dnn hdd .7oe.b/erator that undergoes the cyclic procd,*ed.peb i/4ooe.n7dne ch7 ess (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 re a:efb-jh1-tqversible cyclic process (ABCA) shown : aeqjh-b-f1tin the PV diagram. Process A →B is adiabatic. What is the efficiency of this engine?

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