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 would g/tvvmop7z7 t5r4 h0 o)5hbgrmost nearly be the average sp5rzgvr )th g hobvo7pm4075t/eed 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 i4oe)76gxj ogi0n kd2rn 100 grams of water until both the copper and water are anok o7x40e2)i6drj ggt 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 cylindrg7+-7 +ax(-gddzger dj w3 vsrical piston. 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 theory of gases, when the absolute temperaturlb6 8wxj6hr zcnidu ,g.887i xe of an ideal gas doubles, the average kinetic energy 8 rgd,jb.7 z6 6xihxlcwu8i8nof 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 collide, t0+i:d)l0 6s h njrn. wxzo0npchen

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 ide gx 0nq a1gyjvr-:c01mal gas is discovered and named “Physicsbowlium.” A pure 4-mole sample is sitting in a containerxqrj0y :gn1a0vgm- c1 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 descrso-f+r6cuj: gc-w2 j)teip x +ibed 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 enclo)tq: yn; c3gtpsed 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 explanapq cng)3;t y:ttion 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 idj37ai 3e0e, )voot gobdp5p7 yeal gas is 0.75 atm. T ei 37,0oe)7 jpbo3v5gadpt yohe 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, which os4 y:ve56qxn9ju9uob hgk7o4 ne of the following choices best represents the rms (root mean square) speed of 58 grams of a monatomixsbk5u o7oe44h6 v 9ynjuqg9:c 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 symb;vadc z0 t78crm t(r v4abn)6uol 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 id4ctcm0(a)t6 rn rb z7 vv8;uadeal 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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