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

1#

97.26: The average speezp0f270a/ :dyfaqd ejd of the atoms of a gas at 100 K is 200 m/s. What would most nearly be the average speed of the atoms atj: fay peq0za02 dd7f/ 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 submergor3 * kejs;w7u0ceap+ed in 100 grams of water until both the copper and water are at the3s*ue+co70e; apj rkw 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 gas g72lajb / sq8cis 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 )nyw rh6bg-l(temperature of an ideal gas doubl6-nl)w(hrb yges, 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 q db(vczvgtgo2tl. 1:+q(zy*ve9n h .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 ide. 8 rc4m8,iutaq)*-k;9g eidoemsdj j al gas is discovered and named “Physicsbowlium.” A pure 4-mole sample is sitting in e j4ro ,;s8jtk)q m u-mgid*di8a.9eca 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 thasroh 31f e d.dx7f +yakq)r64zt 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 enclosed in a container. The voly yc77ww w j r5kjjo.qlqmn) (0i10n2kume of the container is reduced to half the original volume at constant temperature. According to kineto 2wkjrnqk1iw50q 7 .0 c wy7l(mjjyn)ic 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 (a em7*fpu4n mtwo moles of an ideal gas is 0.75 atm. The temperature of the gas fa 47( pnm*umeis $100^{\circ}C$. 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 followi 6wyjoysrvvkcu6a 94jj 14o2ibf1 (f3ng choices best represents the rms (root mean square) speed of 58 grams of a monatomic ideal gas at a pressure of 3.0 atm in an e wv(2 oc 4br isj6yfoj6jua491kyf 1v3nclosed 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 Physicrxpq d ppp+6cuj173iqkcn73 4sBowlium (atomic symbol Phys). Its entry onto the standard periodic table of elements appears as in the figure (wi7+qr 3pj d uiqp6k3cnp4cxp71th 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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