Efficiency, coefficient of performance and Carnot Cycle

1#

03.47: A monatomic ideal gas is usedr4wz(s jjosgg ao .q8u,*q/2h 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 thj2/8ag.h wq4o(su ,zo*q sgrje 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 er(1glaqw c :*vngine 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 pet31h- y( hsx/2if wblarforms 50 J of work in each cycle./-saib3h 1 flht2yxw( 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 ope6s*t/64fxjmx9z*8a 0sa1auj giuy m c rates 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 outside environment is j i6gi4 hv)an3lu94 zsat $22^{\circ}C$ 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 ideau*g2 5qv) fm:ho9a5oyhs) iwc l gas is the working substance for an engine that undergoes the cyclic process (ABCDA) shown in the PV diagrhmqha cs5go29 5i w)*vyfuo):am. 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 workwat oeo iu/z(p2qo9*to*0g3 ping substance for a refrigerator that undergoes the cyclo u(p*q2 aoo09oi3zgw/tt pe*ic 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 reversible cyclicvj6*1ku d/a/z- yywde process (ABCA) shown in the PV diagram. Process A →B is adiabatic. What is the efficiency ew6ydv1y/a udj/ -zk*of this engine?

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