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 r-ot6 6s5qhp2jq h)pp.b i)an 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 heat is expr )hn)q.ppbjs piao2-t5 h6q6elled 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 (g-4jj0sf-r xl 0lffkv54uvb2 Carnot) efficiency 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 Jxx z)h/t3*wc0l2kqfm of thermal energy and performs 50 J of work in each cycle. What is its efficiz)/m3fhxw*xk l2q t0cency?

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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 operay6 ;r 9k8whfsbvm dijrzsv/c80986rm a f/c4 ytes 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 mu7p mqaya -j2/zst operate when the outside 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 anzr8e. w,em+c w engine that undergoes the cyclic process (ABCDA) shown in the PV diagram. The processes are all isochoric or isobaric with pressures betzre+ce8wmw .,ween $P_0$ 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 c,ecbt n)us,*refrigerator that undergoes the cyclic process (ABCDA) shown in theccten ,b,s u)* 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 cyclic processyhb u1i2hx2n3e 3x0t s (ABCA) shown in the PV diagram. Process A →B is adiabatic. W22eub hyx1xhs3t0i 3 nhat is the efficiency of this engine?

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