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 wo)x vfw xy4-licn /jg;,rking substance for the Carnot cycle shown in the figuren)l- i,jxg; /4wx cyfv. 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 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) e*d6 )mg xuec-xfficiency 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 performs 50 J of worh f(pmvw,- r,ek in each cycle. Whatv,w,(rpme hf - 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 4iqi. i izvz(+1kn z+/unp7gwof $273^{\circ}C$ 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 i7,s2m0i oi2swe.w f i7az le:5npt5gms 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 thea91n3 (amtejl working substance for an engine that undergoes the cyclic process (ABCDA) shown in the PV diagram. The3 (a9name jl1t 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 iv)xk+thw5lb)h h4 dq,s the working substance for a refrigerator that undergoes the cyclic process (ABCDA) shown in the PV diagram. The processes are all isochoric ,))4thhvw dk bx+5hqlor 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 th0ot4vxhg6 tbjy kz(lct f9(81e reversible cyclic process (ABCA) shown in the PV diagram. (bft64c vtljkyz9g 18x0h to (Process A →B is adiabatic. What is the efficiency of this engine?

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