Efficiency, coefficient of performance and Carnot Cycle

1#

03.47: A monatomic ideal gas is used as the working scwam.s,u ,xetu-v+ o-+ hys; pubstance for the Carnot cycm s,ywe,++;ox cp.-au ths-uv le 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 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 eng 1o3 rwn6tu/2dx2mlhd ine 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 ther4 enty9d qh6w,:dbt3lmal energy and performs 50 J of work in each cycle. Whatyb49lq,6enw3d tth: d 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 af03a1xh3ru e v 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 is at r:wl;q aw v+d.$22^{\circ}C$ 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 ideg/0uot m*5euh al gas is the working substance for an engine that undergoes the cyclic process (ABCDA) shown in the PV diagram. The processes are all isochoric or isobaric with pressures betwee5uo /e *tgmhu0n $P_0$ 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 6. x3jdajv9v ha refrigerator that undergoes the cyclic process (ABCDA) shown in the PV diagram. The processes are all isochoric o jhvajx9.vd63r 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 prh6/jxnrah1 h3 ocess (ABCA) shown in the PV diagram. Process A →B is adiabatic. Whatha1h36 /jhrnx is the efficiency of this engine?

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