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

1#

97.26: The average speed of the atoms of a gas at 100 K ist6i2xjw c6zk 5m us(r6 200 m/s. What would most nearly be the average speed of the atomc jr26uwsk iz(xm566ts 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 samp 3k0gdxf5 as7ho2ca)bhrax. +le of copper is submerged in 100 grams of water until both the copper and water are at the same temperaturexhr)f h+go0.kd xs 75a32aabc. 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 heatedi) s 0x8e*uksm3v j+tr 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 theoty 8 x.zz:4i9w crkvrqq-qmqw+8t8 y8ry of gases, when the absolute temperature of an ideal gas double y.4w9qr8 m:qtvx8ycqr tkz i+-8zqw8 s, the average kinetic energy of the molecules 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 molecules4j-k 2yafzix8t0g +mk in a gas 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 vw x 17xrzurw-v1 a+5cdiscovered and named “Physicsbowlium.” A pure 4-mole sample is sitting in a container at equilibrium 5ww1r varx71-v+ zxucin 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 temperature at whici;wb3 4k uibc* jdbkfd(58k3xv4: yyvh

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 i h(zzlk42kif)v/o ,sm s enclosed in a container. The volume of the container is reduced to half the original volume at constant tempera(if2m z,ko s)zkv/4hlture. According to kinetic theory, what is the best explanation for the increase in pressure 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 inside a container with two mrsc/7 ttmdg6p ,4khx3ui e. 6aoles of an ideal gas is 0.75 atm. The tempera6t4 gi3ruckmxa6h,/7tde p. s ture of the gas is $100^{\circ}C$. 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 beu adgxxshmhavxuhzs3rd2wl04 6 19k5v/p .-7st represents the rms (root mean square) l xhwk-1593xu h7 4gvh20sdmurdz.s6p v/xaa speed of 58 grams of a monatomic ideal gas at a pressure of 3.0 atm in an enclosed 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 symbol Ph ly9lxndg2clk 50-e,*cxa ev1 ys). Its entrl,egxd v0l 1ac*-ne5 yxk2c l9y onto the standard periodic table of elements appears as in the figure (with Helium shown as well). Given a sample of Phys which acts 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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