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 ic0(g4br+gt xpeacq+,j)dt; j s 200 m/s. What would most nearlye,+4 agtj;c) gqj pc( d+rtx0b be the average speed of 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 stxac 9mu-nyjw) 6xhwa)7k* ube wt4.:ubmerged in 100 grams of water until both the copper and water are at the same temperature. Whicht).yuj*cb9wu) -k:hwa xxa67me 4tn w 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. Whejs-gufc 8sauwo -5,69iyf 7uk n 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 temperaturewx h 6au(oh,36gsdxs8 of an ideal gas doublesg h usxa8(,6 s3ox6wdh, 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 gas collide, thakyiy79ov .z0 en

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 and named “Physicsbowlium.” A pur uh2+jiv pt, e dm8crrr8; 2rvt4u/hb4e 4-mole sample is sitting in a containertr/u4 r2rr8pubd+ 2 ,hj;4 e8cvvthmi 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 temperac,wraui q., g4d d+nd0ture 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 of the container iuex58h 5iywlf-r)4izs reduced to half the original volume at constant temperature. According to kinetic theory, what is the best explanation for the increase in preshf zi4)yrue5 xl8 iw5-sure 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 g .mq hez6+:rplas is 0.75 atm. The temperature of the gas is :h.eml +rz 6pq$100^{\circ}C$. 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 o*5r1 u9ym((9fnp/hnx df gy2hg tpup 2f gases, which one of the following choices best represents the rms (root mean square) speed of 58 grams of a monatomic ideal gas at (hdfn295t u/xup(1rfyp9y 2gn*m gpha 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 Phyrw nzp6:7 (qwssicsBowlium (atomic symbol Phys). Its entry onto the standard periodic table of p: znqw7s6(rwelements 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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