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 100m 3t5,1xjwn9s c7zm yj 87yjri K is 200 m/s. What would most nearly be the average speed of the atoms im1t53 c,sxw8yrj7nz9j y7 mjat 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 grams of wat kkuknq) nq 8ve67*oo.er until both the copper and water are at the same temperature. Which ok*o78kv qne ko)qu6.nf 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 cylzvd.l)u bb;a8 indrical piston. 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 thl dp,61.kohv +/oblyr:*vybq eory of gases, when the absolute temperature of an ideal gas doubles, the average kinetic energy of the moleqvpv.+1: ,/r*ybkbo l6lyh do cules 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 coll)r6*p3v,u c uhenj)uiide, 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 monatomi2r7 dx4chcpulq ib:02e f8w7u c ideal gas is discovered and named “Physicsbowlium.” A pure 4-mole sample is sitting in a container at equilibrium in d 2 ex q08bli2: hfr77pu4cuwca $20.0^{\circ}C$ 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 zeronkex/ qsu q4:49s6mgl is best described 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 yz nr41y t)a;sp rd+qa-3hpf0container. The volume of the container is reduced to half the original volume at constant temperature. According to kinetic theory, what is the ;4n1r afpsq yd 3ry )zat+ph-0best 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 i j;p3tlo y7* o7t(bo,l3 rb2+udamdup nside a container with two moles of an ideal gas is 0.75 atm. The temperature of the7p+jy(r2ulbla 3o t3o,m*7 updtob ;d 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 b4)xjo1 aj qhql82gv77c1 qde following choices best represents the rms (root mean square) speed of 58 grams of a monatomic ideal gas at a pressure of o7a1h12d 7cj8exjq lv4gb )q q3.0 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 symboh.lvmbhphn3u 0 c(5.al 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 t a(.hmvc5p3nu. blh0h he root-mean-square speed of the atoms of the gas if the sample is at $20^{\circ}C$?

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