Internal energy and r.m.s. speed - 无忧得胜-网上国际课程 (5edu.win)

1#

97.26: The average speed of the atoms of a gas at 100 K is 2h/omy b485 gxc00 m/s. What would most near58g hmb/y 4xocly 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 sampnf6u db nyy 0ji6a3qv/188uu jle of copper is submerged in 100 grams of water until both the copper and water are at the same temperat n1u/jj0 6buq3nia8yv6 y df8uure. 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 pisto0qjx0t)m 5)qgofdrml aw 15)gn. 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 tempeajp/cm0 r6a q v;c0rt9 ,y3mpvrature of an ideal gas doubles, the averagery09a,a63m; /qvpmr0c jtpc v 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 c2 3ur uo2yu,on9 jny)yollide, 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 and named “Physicsbowlium.” A smucvb. 1/:yrd/mnfx ke6w9+pure 4-mole sample is sittis 61ud rvmwy mx: f/+e/b9k.ncng 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 temj4 ,wbeqxo ;0c(kdj j9perature 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 vwr.a 5lo5f -ci4jipp;y.14+du byl r volume of the container is reduced to half the original vol .+5. -fjdp4w1i;plr vroy yua5 cbi4lume 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 insiis na n 3s*xps1)cnpy4n+7(np de a container with two moles of an ideal gas is 0.75 atm. The tempers(31+)c ppnsnnxianny p7 4* sature 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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本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

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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 kin,q y)fl ejx ggyc 9k(i.9gun 958):s im6usjaaetic theory of gases, which one of the following choices best represents the rms (root mean square) speed of 58 gli,eguqy)gc 69i aaxu f.y9k)jgm(s j s58:n9rams 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 discovec.q1.vaew6f q( lsd ,ured and named PhysicsBowlium (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 sveq,6a wc.lf(sqd 1 u.peed of the atoms of the gas if the sample is at $20^{\circ}C$?

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