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

1#

97.26: The average speed of th2 gmadv 5;mb:fe atoms of a gas at 100 K is 200 m/s. What would most nearly be the average v;gf bd2mam5: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 /p*rui :r9kgv:nn mzd zlu-0 ;ata 9jt4g ,r5fis submerged in 100 grams of water until both the copper and water ark*rg,9 - urmnidtl:utn a 95g:z ;z/fa40prvje at the same 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. When,qt0gs(up /df 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 temperaturu cwyg 6y4x*if;w.* te,ts6 wq* d,xqoe of an ideal gas doubles, the average kinetic energy of utc;g 6*s6w*odq i*.y yw, ,4exqxwftthe 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.;f,qv6v mnt+7 vvaax 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 gas is discovered and naky5bi;+rqfk21hl 1if kl 3 snhey61:omed “Physicsbowlium.” A pure 4-mole sample is r1 l1; f2i ynfk1eh:3b+ilsyo6 k k5qhsitting 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 yhd9p;; ;b,d6pon isiat 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 con3 ) 4u38nqcdeir jg3bltainer. The volume of the container is reduced to half the original volume at constant temperature. According to kinetic theory, what is the best explanation for the increase in pressurgc8)u d3rnl ji bq33e4e 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 wig)y d)a:*:m0pc wf /cgck9zpeth two moles of an ideal gas is 0.75 atm. The temperature of thgefy ) k*:wzc)9mp0:ac p gdc/e 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 tf:sf(qzs :*t nsn+ks. heory of gases, which one of the following choices best represents the rms (root mean square) speed of 58 grams of a monatomic ideal gass:zn ns:*. ks(ffq+ts 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 nly -)30e (rpv0 trg1dt,bp6 v0ay u ub**khhdand 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 o0*e htp)ukh ,0rn vdlb16audryp*y (gv 3b0t-f 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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