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

1#

97.26: The average speed of1ty2awy/3bj ot5+ suq gx6u g, the atoms of a gas at 100 K is 200 m/s. What would moxj /,32yu us16ybq+t5aogwt gst nearly be the average 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 or/2l 3sflye7*;f f luof copper is submerged in 100 grams of water until both thesf r;2* 7ley3lofful/ copper and 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 enclosed in a cylindrical pistt4n95ny mz f::rjm egrv,5dn0on. 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 tempeh l kyg5w2n/,.as quqmdbpz 2p-* .b2irature of an ideal gas doubd*q,bybls2h w5pa m..p-2g/i kuq 2nzles, 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 molecu*x -4f e stir))*; 1i 5oglzzvjhcws4iles in a 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 is discovered andi+a*m) iz3tx8m2 vdh m named “Physicsbowlium.” A pure 4-mole sample is si32im )maz8+*i m hvxtdtting 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 tempeznbz7l3i7uvpd( r n*fgqg8m-/ +l,i c rature 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 conte+ ueb 8asghj 3g*kw)4ainer. The volume of the container is reduced to half the original volume at constant temperature. According to kinetic theory, what is the best explanation forj )3* g+suka4heegwb8 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 insideu9i x2n+0kb lf a container with two moles of an ideal gas is 0.75 atm. The temp +n 09fib2xlukerature 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 following choicesf3oqu+r rng2 ; c69 nsg*iufv6 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 ono;ru *u6r fgvs6c29n3i + qgff 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 namcilgh)p hhx.3upsf tjn bp49 61)6t+led 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 of Phys which acts as a perfect monatomic ideal gas, what is the root-mean-square speed of the atomsl6b+ 4 fc pst.h hxg6l9h))nu 3p1jtpi of the gas if the sample is at $20^{\circ}C$?

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