Efficiency, coefficient of performance and Carnot Cycle

1#

03.47: A monatomic ideal gas is used as the working substance for the Cftequ)qy /d 9.arnot cycle shown in the figu.feqd /q9t)y ure. 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 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 o; vg1lf:sdu4 mf 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 Jn9 l7+w exzus) of thermal energy and performs 50 J of work in eac97+) elx sunzwh 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 temperat3bh x :/s.ucp+j r scb7jm2vt+ure 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 environmenba4 z,/bxi 7nfp x8-ugt 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 unde7k6aruf7pk9 d rgoes the cyclic process (ABCDA) shown in the PV diagram. The process7pa967kk dfur es 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 t:va-6xvi 42nw,bn(p,m aft bmhe working substance for a refrigerator that undergoes the cyclic process (ABCDA) shown in the PV diagram. The processes are all isochoric or isobaric with pressmvm,pt6x-, nn( fa:wv ib4ba 2ures 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 ztzlbq8 *p 5/ythe reversible cyclic process (ABCA) shown in the PV diagram. Process A →B is adiabatic. What is the efficien/lzpb 5zt q8*ycy of this engine?

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