Efficiency, coefficient of performance and Carnot Cycle

1#

03.47: A monatomic ideal gas is us7rxp: ;all5tnx3f+p0-)nuts8d axjced 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 heat is expelled by the gas during proc f -a5xun n;7 crs)xjlx8:pa d+pt0l3tess 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 ;(v gly;r ;sgndz -j;jof 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 performs 5i qul . ofw5f nu6ck(r,ei.*a*/vkbu. 0 J of work in each cycle.wk ,a6 ckie r .5.infufouq/*.u(l*bv 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 temperature dc ,kpc,:xhjn oz8t;7vxq/, yof $273^{\circ}C$ 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 la9 a+ ka,4t47sexeunis 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 substancsw0 hw azn;1w3ass x2d,vbi,6e for an engine that undergoes the cyclic process (ABCDA) shown in the PV diagram. The pr n 1hzs6ia,3,wabs;w0 wd s2xvocesses 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 working substance for a refrigera21aot x a(h6o 0 jlif5+in8symtor that undergoes the cyclic process (ABCDA) shown in the PV diagram. The processes are all isochoric or isobaric with pressures between6+ h iinx ao0s81mf5 t(loy2ja $P_0$ 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 rej+p*ia5 w;c 1s7fesee0ub i6c versible cyclic process (ABCA) shown in the PV diagram. Procesi;ipe cw*j6f5e+ a17u sc se0bs A →B is adiabatic. What is the efficiency of this engine?

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