Internal energy and r.m.s. speed - 题库网 (tiku.one)

1#

97.26: The average speed of the atoms oap om/vd.gu, 1f a gas at 100 K is 200 m/s. What would most nearly be the average speed ofu /,1mpva.g od the atoms at 300 K?

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

01.29: A 200 gram sample of copper is submerged in 100 grams of wf zjqco,0 - ,pv(ng)ypa /o.gaater until both the copper and water are at the ag0v/aypof,, (- pgn ojq.)czsame temperature. Which of the following statements would be true.

A. the molecules of the water and copper would have equal average speeds

B. the molecules of the water and copper would have equal average momenta

C. the molecules of the water and copper would have equal average kinetic energies

D. the water molecules would have twice the average momentum of the copper molecules

E. the copper molecules would have twice the average speed of the water molecules

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.08: A gas is enclosed in a cylindrical piston. When the gas is heaa4p4,)(qxfg jz e 1frlted from $0^{\circ}C$ to $100^{\circ}C$, the piston is allowed to move to maintain a constant pressure. According to the Kinetic-Molecular Theory of Matter

A. the mass of the gas will increase

B. the number of molecules of gas must increase

C. the size of the individual molecules has increased

D. the average speed of the molecules has increased

E. the molecules continue to strike the sides of the container with the same energy

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

03.21: According to the kinetic theory o;p01p n7mtz x /y+thkfuu8z q6f gases, when the absolute temperature of an ideal gas doubles, the average kinetic energy of the moleculeuupymhtz 1+/8qxz p60n7 f k;ts of the gas

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

04.23: If two molecules in a f4 hc6b)wk w+zgas collide, then

A. total momentum is always unchanged.

B. velocities are always exchanged

C. both molecules always speed up.

D. total kinetic energy always increases.

E. velocities are always unchanged.

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

05.40: A new monatomic ideal gas is discovered and named “Physicsbom/5uiy 1 rqz yd,y7o*awlium.” A pure 4-mole sample is sitting in a container at equil 5qy, idaouy* y/7z1mribrium in a $20.0^{\circ}C$ environment. According to the kinetic theory of gases, what is the average kinetic energy per molecule for this gas?

A. $4.14\times\:10^{-22}J$

B. $6.07\times\:10^{-21}J$

C. $2.02\times\:10^{-21}J$

D. 3652 J

E. The molar mass of the gas is needed to answer this question.

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

07.38: Absolute zero is best described as that temperatu/c 17an 6y6h7dlk* qmqr lsxr4re at which

A. water freezes at standard pressure.

B. water is at its triple point.

C. the molecules of a substance have a maximum kinetic energy.

D. the molecules of a substance have a maximum potential energy.

E. the molecules of a substance have minimum kinetic energy.

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

08.39: An ideal gas is enr)y)6 /-krd446gnqka q vbpmkclosed in a container. The volume of the container is reduced to half the original volume at constant temperature. According to kinetic theory, what is the best explanation for the increase in press6p4 k)4vn/mkdq6- arbr)kqygure created by the gas?

A. The average speed of the gas particles decreases, but they hit the container walls more frequently.

B. The average speed of the gas particles is unchanged, but they hit the container walls more frequently.

C. The average speed of the gas particles increases as does the frequency with which they hit the container walls.

D. The average speed of the gas particles increases, overcoming the decreased frequency that they hit the container walls.

E. The internal energy of the gas increases.

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

12.27: The pressure insi x uruhla3q /tjo)m o-/)4wc/ede a container with two moles of an ideal gas is 0.75 atm. The temperature of the gas 3el4qxo)mj-) / r/huwc aot /uis $100^{\circ}C$. The container maintains constant volume as the pressure is tripled. Which one of the following choices best represents the temperature of the gas after the pressure is tripled?

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

12.40: Using the kinetic theory of gases, which one of the following choices bfqwx)y +yq 4xs6osj(3est represents the rms (root mean square) speed of 58 grams of a monatomic ideal gas at a pressure of 3.0 atm in an enclosedyjfqy) (wqs3so4 6 x+x container of volume 6.0 L?

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11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

14.37: A new element is discovered and named PhysicsBowlium (atomic symbzl; / ,5gtmh:vu*gdefk+ 1minol Phys). Its entry onto the standard periodic table of elements appears as in the figure (with Helium shown as well). Given a sample of Phys which aigt1v flk*,/5 e+hmn :u gdz;mcts as a perfect monatomic ideal gas, what is the root-mean-square speed of the atoms of the gas if the sample is at $20^{\circ}C$?

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