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

1#

97.26: The average speei 9to:q1 qrit u9t 9tqm -q.5osf2wkt+d of the atoms of a gas at 100 K is 200 m/s. What would most nearly be the average speed of thmo-t :+q1f9 9utt t52skqi trq9w .ioqe 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 grams9su3th *.qwpbpd e 2h; of water until both the copper and water are at the s*t bh2hdp3.pews; 9uqame 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. Whfdvx+y 7 1f8inen 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 temperatf2doq*xujr tp*+itr z( h-o24ure of an ideal gas douj -xq2* *4(2iotprtozr ud+hfbles, 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 in a 6xx,ry53a rs t+futu. 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 ga dtpzthq .g*4zx1/fr(s is discovered and named “Physicsbowlium.” A pure 4-mole sample is sitt4.rhz1 gdzft*qtxp/( ing 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 described as that temperature at wn+q7md1 ujdws zi ,r51h6l; xjhich

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 contnphu+(pf(s.k )e v8 anainer. The volume of the container is reduced to half the original volume at constant temperature. According to kinetic theory, what is the best explane((vskhp n u+.fn a)p8ation 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 contaied+ phtk/*i s4,2(bw o8gnrq jner with two moles of an ideal gas is 0.75 atm. The temperature of the gas iwk+ i8jp(2gq ob tdrne*h, /4ss $100^{\circ}C$. 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, whichatlyzlegg,+2 +f 9) nh one of the following choices best represents the rms (root mean square) spg2g,)+yft z ae+9 lnlheed 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 PhysicsBowlium (atomic symbol Phj4fp6;1k)etm qczr+fp9 o : vcys). Its entry onto the standard periodic table of elements appears as in the figure (with Helium shown as well). Given a sample r:4vzptp o9kfcem6+ ;1 q fj)cof 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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