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

1#

97.26: The average speed of the atoms ofe/ b x5l)qh5k-wb5cft a gas at 100 K is 200 m/s. What would most nearly be the average speed of c/w5h qt5)5b le-bxfk 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 water vi mi75*3zrovuntil both the copper and water are at the same temperature. Which of the following 3 o7z vi5vim*rstatements 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. Wh4dubt rh;t r,-en 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 temperatureutbl, er8 + zqf91obky-7:ofz of an ideal gas doubles, the average kinetic energy of the molecules of fb, 8 oo+k1r7zeyzfu-q t9:b lthe 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 molecucdm(;ej* s3dp w z j9u*ad,kuf*+j3oeles 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 ideal gas is discovered opz. pe*u+u .hs:7me;0 -0rdy wzzix gand named “Physicsbowlium.” A pure 4-morpo:0esgu0 w-*.x dzuz h.zy7e +m p;ile 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 desyc z9:foy5khu , ly) 8rd7+9hrczkt,pcribed 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 enclosed in a container. The volume o8;uw+3tx0+ td- upjw x6y unhif the container is reduced to half the original volume at constant temperature. According to kinetic theory, what is the bes+u6uy - w dutn+hxip;jx830w tt 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 ideal 9 myp,8e+j1t8lpihra 8mvg6 cgas is 0.75 atm. The temperature of the gas 9lrta1mgji 8pmc,8ph vy6 e+8 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 one of the follow,wmj 8x9g+5fgxs8 bhving choices best represents the rms (root mean square) speed of 58 grams of a monatomic ideal gas at a pressure of 3 x+w f,bjm8g9g5vxh8s .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 (atom5;0(fcs 1ld) el 92b unmxhw06wcjfjlic 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 Phfld1 0fb; h0sc 5emw l9uj x2jcwn(l6)ys 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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