Efficiency, coefficient of performance and Carnot Cycle

1#

03.47: A monatomic ideal gas )o8ud qypb+4/kbs 2e -vkvm*z is used as 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 adiabatic. During process A → B, there are 400 J of work done by the gas on the surroundings. How much hu+2bk v k/8ozsm4)ypq-b*dve eat 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 em+ p-hy7qsd ki- t 2++eky(xvjngine 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 ther yyvkqs)8+/c,)a7vf ca1 gbu dmal energy and performs 50 J of work in each cycle. What is its effi+ cd)1y/aba)vvqk ,gcsfy u78ciency?

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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 ope-y)luwt7prj- jilm4+c3s6,g l qvj* jrates between 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 ousziq m ia77gs0m 6u1woh9-3putside 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 engine that unde5q2jbwtdt1 a) rgoes the cyclic process (ABCDA) shown in the PV diagram. The processes are all isochoric or bjt)1dqa52wt 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 re(znc fpf5, k+cst-,1bcgk(hy qm 92r hfrigerator that undergoes the cyclic process (ABCDA) shown in the PV diagram. The pro nh9c1-, g2cr,t ((+h bcqf kfzpskym5cesses 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 undergwk/ o ) f)ycs(k*4;vct9ltv9jcsu , tjoes the reversible cyclic process (ABCA) shown in the PV diagram. Process A →) fw(voc*c s/ juks t,;l j49tv9t)ckyB is adiabatic. What is the efficiency of this engine?

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