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

1#

97.26: The average speed of the atoms of a gas l(:dc5pftl. fla9w c 0i -fl0fat 100 K is 200 m/s. What would most nearly be the average speed0:(lff.p lwl ff-5 lia cc90td 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 obxx dg,ydfy5 rgm/3,(f copper is submerged in 100 grams of water until both the copper and water are ad3g ry5/fmdbx, g(xy, t 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 pistondyn (+aacgo , 8eh(3wg3jlqo0. When the gas 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 kinetic thafq 0 c 2pahyuoja)p8(sh99v1eory of gases, when the absolute temperature of an ideal gas doubles, the average kinetic energy of the molu paj(8hvfy2ahc)q 1s 9pao09ecules 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*i2be s .0w9kjp amr+n 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 discovered and named “P38pzd i k 739qymb/xndhysicsbowlium.” A pure 4-mole sample is sitting in a container at e8d dqpn xb/3z9y73k imquilibrium 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 temperatubcnne)ylls7 ; aq,5rt4d0 g2y(rgc2 e re 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 enclosed in a coz;c yqxgc01t4 9 iidbn,+pis: ntainer. 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 pressu ptqi+z49c1yb ndxig; 0, :cisre 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.6 )ijbh tezt4 two moles of an ideal gas is 0.75 atm. The tem4zth. )ibtj6e perature 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 ga1y2-+k+kyar m: lt43 ljc ku+yo6nyggses, which one of the following choices best represents the rms (root mean square) speed of 58 grams of a monatomic ideal gas at a pressure of+ yl 1lkj2mg -kau++y y :64tr3gkonyc 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 fb/ - w7y4pc3g3zek o*j 0rkmris discovered and named PhysicsBowlium (atomic symbol 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 33ck04 p bz*ygkr-m/o7 jwe rfatoms of the gas if the sample is at $20^{\circ}C$?

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