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

1#

97.26: The average speepddv8sr 3nq42 d of the atoms of a gas at 100 K is 200 m/s. What would most nearly be the average speed of thed8dpqn 4rsv23 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 submerged in 100 gra ttv/txu2g 55kt (qlfm7t3k.lms of water until both the copper and water are at the same temperature. Which of the following stx.t /vl5lmq t2tf(5t 3gtk ku7atements 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 enclosedwvk ex,g, 2u n: u.gp,w1 ,bgpcihz:s( in a cylindrical 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 gases, when the absolute tbi): 0 ac(iuzzemperature of an idbi)z(u: 0ci zaeal gas doubles, 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,0 ojq,nw- +tui 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 9u80 apbq)cld- p1/*nwmgn tt ,ts0hfis discovered and named “Physicsbowlium.” A pure 4-mole sample iudt sf0g8-c1b p0/ lhp9t)n ntm ,q*was sitting 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 at bgpq;-a 7:5rs7plvk e 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 thmk7,i yk+; . jxs*ej uuh4 zceu.nlt)0e container is reduced to half njky0,e7mux .s4*u .) zjle+t hcuk;ithe original volume 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 inside a container with two moles of an ideal gas is 0.75 atbgnn;i,lh-:q au9n (z5lh( yk m. The tempera-a, nh qy9n5blig((n :khu l;zture 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 theory of o49pnu( 8;igdw igg w1gases, which one of the following choices best represents the rms (root mean square) speed of 58 grams of a monatomic idgnoi8w;1iwpgu9 g (d4eal 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 (atomi 28.cfk+gbv ukc symbol Phys). Its entry onto the standard periodic table of elements appears as in the figure (with Helium shownu8f g2cb kk.v+ 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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