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

1#

97.26: The average speed of the atoms of a grua,o5t0r, vu/ xfh ma4)bdp42 yu+ ibas at 100 K is 200 m/s. What would most nearly be theb 4rfb2+/vu,0oiat 5yxauu,4hrp ) dm average 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 grams of wa 0gy)+f2ugc93 :xtloil 7xthuy23 mygter until both thgxtui)mgx 2o3:7+chftgy l0 y2l3 9uye copper and water are at the same 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 z(; lksb3 vfh0q5zrp,(wp w b2gas is heated 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 5 qw8ga. :ob na9buda-f;xfj*id(kt*wps / i7kinetic theory of gases, when the absolute temperature of i*a(aw.j-:ob 5sqf7an8fp;u kwtx9b d d/ *igan ideal gas doubles, 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 molecules in a gas col35d* pqo9cb.jxo 0zkjlide, 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 qc )o1lt3 8vqmand named “Physicsbowlium.” A pure 4-mqqo t3 cm8)1vlole sample is sitting in 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 described as that temperature at which4d7g-(q utcfv y3y/hp

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 enclmi s8 l7ilw;k0osed in a container. The volume of the container is reduced to half the original volume at constant temperature. According to kinetic theory, what is7l ;8 iliwsk0m 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 w.oxeji9r ,gczn 27l r8 d+o0htith two moles of an ideal gas is 0.75 atm. 980.j ,dleoz+r r2tx7 ogh nciThe 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 gavvii(bab -s4y)+u,s cses, which one of the following choices bestbbc ii -vuv,+ sya)4(s represents the rms (root mean square) 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 P08/aab;cmyfrbu)05z rmm 7i mhysicsBowlium (atomic symbol Phys). Its entry onto the standard periodic table of elements appears as in tr5)8bfmb mcmr0m/a ui0y az7;he 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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