Efficiency, coefficient of performance and Carnot Cycle - 无忧得胜-网上国际课程 (5edu.win)

1#

03.47: A monatomic ideal gas is used as the working substy h2kpwb 83d/)y4gzh vance 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. Duringzbg42vkh)dw/ y y 3p8h 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 (Carnkv-+:k*c km5wod;fyfot) efficiency of 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 J of thermal energy and pe(toqt) *q ;gvxw*rt1lrforms 50 J of work in each cycle.w rtxq)vg;*l*(t 1tqo 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 bet b)q 0pk-kh+/yoyxe: gween a 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 muse /)2riw)8 v3gjquwk(g jt xg+t operate 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 engine5*rcv0 pfby/:3.ukg 0wi ftnl,mn d8 n that undergoes the cyclic proc5kc .03*fmygrdtpb8,u ni n:vfw/ln 0ess (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 worki.a:p c)u17pa:x ohhvll pz,2mng substance for a refrigerator that undergoes the cyclic process (ABCDA) shown in the PV dihpv):, pm. uo1:zah7 lplc2xaagram. 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 po3msgop2 z18undergoes the reversible cyclic process (ABCA) shown in the PV diagram. Process A →B is adiabatic. What is the efficiency of this en3og po2pzm8s1gine?

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