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 is 200 m/s. What woul.js zsz.d(l+ 2ht1 umad most nearly be the avera.h2t.a 1(zlm uz j+sdsge speed of 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 gram n)mtx ed;gs 8ooy;*(us of water until both the copper and water are at the same temperature. Which of the following statements would be truex*;(t em8)un;o o gyds.

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 heated,0 lhxz1k zfa5 p)fpbdjz4 34j 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 of gases 5av+9va(yl tcr0r 9sm, when the absolute temperature of an ideal gas doubles, the average kinetic energy of the mocr9v a9(symt0r+5va llecules 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 gytnnao0p5ns;- /n cn ,)rb iz,as 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 n p vtnwf; mbl7g;/)aox(e/8b jamed “Physicsbowlium.” A pure 4-mole sample is sitting i7welbg)b(; o/np av;8txf j m/n a container at equilibrium 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 desc y vkm v63k46y t0rx6,gytivn7ribed as that temperature 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 emb ihu *93 ytv4im7m7,u+ eexanclosed in a container. The volume of the container is reduced to half the original volume at constant temperature. According to kinetic theory, what is3 9uuva*xmei7m+th4b7me i,y 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 moles of an idhr;drlo:n eyc*usa 41n 6.e(beal gas is 0.75 atu;one.6chb *de:al4nr( s1 r ym. The temperature 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,+n(wag(; dojy ptti3 - which one of the following choices best represents the rms (root mean square) speed of ;w+ oa(3y gti p(j-tnd58 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 symbpkiku 3m8h502 zbpm ,wol 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 acts as a perfect monatomic ideal gas, what is the root-mean-square speed of the atoms of the gas if the samp 2ihm0b385z ukppmw, kle is at $20^{\circ}C$?

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