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

1#

97.26: The average sm(qv h6 x6orm1peed of the atoms of a gas at 100 K is 200 m/s. What would most nearly be the average speed of the atoms at m1hx qomr (66v300 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 gramu7 akxju4;0g fs of water until both the copper anduujxgf0ka;7 4 water 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 encl:f,fin82ymo j3kk g .losed 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,1h5d p6mqcvm 6)-yd hr +og2vu when the absolute temperature of an ideal gas doubles, the average mv)hpy-+hrov d66gqm 5d 2uc1kinetic 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 537n+h3qicla32l i 1fl4kzh5gx up zga gas 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 iso.1z hhatkuaaxqj 2(z8lp3 53 discovered and named “Physicsbowlium.” A pure 4-mole (kh1ha.ul o5tjz p82zxa 3 q3a sample is 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 describegll9w ( geti*xk 2y;c5d 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 container. hce -;2kfrs ,akwh9b gf.o w)1The volume of the container is reduced to half the original volume at.h )o ks gh ;awk-9,cffb1w2re 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 with7o+ki9 ea pee*ffwpr4;rhs9 n a3d..p two moles of an ideal gas is 0.75 atm. The temperatu+.r 7*h3p few pf49e iso danepk.a9;rre 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 gases, which one of the fhd6.bg ae)8(weh:3aa ug1q - 6gdarniollowing choices best represents 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 h ga1rauw6-aib 3(eg d).6he:qadng8of 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 discove rq63yzfe6vp *jd 2a51di1iun ilie;+red and named PhysicsBowlium (atomic symbol Phys). Its entry onto the standard periodic tablelfi+yi1aj1 pn6i q;ze 2e 53rdd6 vu*i 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 speed of the atoms of the gas if the sample is at $20^{\circ}C$?

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