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

1#

97.26: The average speed oc+ d 0s(,fppzzf the atoms of a gas at 100 K is 200 m/s. What would most nearly be the average speed of th,csdp +p0(z zfe 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 i 0wg n43sv1gap,nnbv:n 100 grams of water until both the copper and water are at the same temperature. Which of the following statements would be t:nv0 pvn nwba1 ,3gs4grue.

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 pisto.ii; b98fsrmr 8u+mhu6o*e i kn. 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 t6v jg((3tgiidvtljr 4l,v +2r emperature of an ideal gas doubles, the average kinetic energy of the molecules of the gai6v td+jgjtvli2v 3 (,(4g lrrs

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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, twjx br/*e7kc :hen

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 b/qjqxeeea 4kh(:jjq t):7wqco 3 5 8vghp0 m2gas is discovered and named “Physicsbowlium.” A pure 4-moleqm/q3w8h5j)a(k 42jjch7pq:e oee b :v0 gxtq 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 described as that temperature at whi m(ecf) k ;zrvf;h:cx+ch

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 of thr75sai on pa vo j3q*:m-88supe container is reduced to half the original volume at cons 8i7a-pmuo35as soj*vp: q8rn tant 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 inside a container with two molekyu- s2i,, q/pkhlp1 xs of an ideal gas is 0.75 atm. The temperaxy /p l,1kskp2h-i,uqture 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 one of the follo0 lumc(l*l7x 3oxz;ite;x 3 ;.qcaa4 b;d vmxvwing choices best represents the rms (root mean square) speed of 58 grams of a monatomic idem ec4al;(;dl3zo7*.lc3mx q;x ;txa0v ivu xbal 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 Physwn-m4eajkcsf;;opw(,k 8p0l icsBowlium (atomic symbol Phys). Its entry onto the standard periodic table of e; p ncl4o 8pmka-f; (jwske,0wlements 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 the atoms of the gas if the sample is at $20^{\circ}C$?

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