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 mmef ,9ft;x84mu( (+ uetno t1nlo vs/lost nearly be the average speed of 4o19n (l /+m;( ,sx8mnltttefefuuvothe 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 submerowa+ 8:mkfdlx*j 1+mexjy -m2ged in 100 grams of water until both the copper an8-axwo xek jjy1++m flm: 2dm*d 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 gas is heated from k 47g*1 uy wvn:g8hq*p i1vxyi$0^{\circ}C$ 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 absolsut 6kn-s-v ycii:vt3i)* e8u ute temperature of an ideal gas doubles, the average kinetic energy of the molecules of the gak: -s-cev8nts)*y iv i6uuit 3s

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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, th h i1wuq;ouios3ot25w :bv:-97ar tqben

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 ideefc) v0h k 1bngmsnk75+) i;6sj itt7eal gas is discovered and named “Physicsbowlium.” A pure 4-mole sample is sitting in a containevh; )f njt 7g+i7e ic6smt)s kkneb501r 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 desck.rv. 2 :0+b miizgf /j84 djebao3vl, bdf7ubribed 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 con i d:tj9 w,hwyq(n-h6atainer. The volume of the container is reduced to half the original voluidw6y:-h, aj9h(q tnw me at constant temperature. According to kinetic 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 ins9lvz1.v m0q seg1x6c8/mdvwqide a container with two moles of an ideal gas is 0.75 atm. The temperature of thev .0 w qd6zm1c9/lmv8x 1eqvgs 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 theor0)bd:vu .* 4jdw8q1kcq v.ema7sx;zpoknx - w y of gases, which one of the following choices best represents the rms (root mean squa7qk4.ex ) 8so jmz0*d 1u-;w k:b.wnvvcpaqdx re) 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 Physcebs 08g6 3/bq5 ay bmnmhj)g9icsBowlium (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 thee6 g8mmb gj3n9 b)ba0hqsyc5/ atoms of the gas if the sample is at $20^{\circ}C$?

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