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

1#

97.26: The average speed of the atoms ojx+f7koodd mq2q5h9, f a gas at 100 K is 200 m/s. What would most nearly be the average speed of the at+h fd 2m,oqdojk75x 9qoms 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 in 100 gram33 f7yer j09)dkpxbm1z cf st5s of water until both the copper and watersfjxct1fdk9)3b rmp y53 ez 07 are 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 c s8r21 it 1-hvpibx:3ymna /eoylindrical 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 theory of gas +9p vaqf/f92 8lmy)e cykcy9res, when the absolute temperature of an ideal gas doubles, thep9kfc)yq8r29l + ea yym/c9vf 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 collignhqy0kjjvo4:k5rml n .*58g(d o b (lde, 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 andz3ekwkxp5dis q ,e8 ,9nbju+5 named “Physicsbowlium.” A pure 4-mole sample is sitting in a contaukz 3 se njqxd5w+b 95pi8,,ekiner 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 desc; cbl1mhx 9bi 8.4 *ed6camm4evoxlo 8ribed 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 eni ad,o ++f;kyua)-sg nclosed in a container. 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 pressure )fokag- y,d su;+na+icreated 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 contmhxp vx jd:a/rg: 1f 0q5o0sx2ainer with two moles of an ideal gas is 0.75 atm. The temperaturej sr1mv hp: 0axf:q0/52gxxo d 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 theot q;/kv pzx o4;6 ltl*tjy23drry of gases, which one of the following choices best represents rl3kjtp;t ;dq4 ox y2tz/v l6*the rms (root mean square) speed of 58 grams 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 discovered and named PhysicsBowlium bil*yc78ne7 2wo6y2lsl y v0x(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, whatbnlys0l2y o2 7y 7vwl*e86ic x is the root-mean-square speed of the atoms of the gas if the sample is at $20^{\circ}C$?

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