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 substa l:fiscg-k5 *pq.0oe( edm,x. xdgy7mnce for the Carnot cycle shown in the figure. Processes A → B and C → D are isothermal, whil.(meodfc.x-0:dmgi p5g*kly7 e qs,x e 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 ens41qngnkooj r,d;lpq99 a8l2 gine 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 gu031mc( wahk200 J of thermal energy and performs 50 J of work w(ca 0gukhm 13in each 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 stm ks 966bhhe7 wou9jz :8i;gbetween 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 must operate when the outs( h w)zyv (8,xarruhkk,c9) zeide 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 anw z7zzpq1(fb*uwx.a5(cz,jn engine that undergoes the cyclic process (ABCDA) shown in the PV diagram. The processes are all isochoric or isobaric with z(afxb5zu7j w1c n, w p.q(zz*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 refrig*k,0de4yn h,ioh0rmzc11 cfgerator that undergoes the cyclic1c zh0 *,f4hry1k,oi0cndg em 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 reversibld/3 wgxr 82z ze2s) f9ui*h)s2wrzn6 ifad9cle cyclic process (ABCA) shown in the PV diagram. Process A →B is s)zi cxwed3i f )hz9r9nulsa286/2dfg*rzw2 adiabatic. What is the efficiency of this engine?

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