Physics Unit13: Temperature and Kinetic Theory

1#

State the zeroth law ofqk,dwj)o 4+ zi thermodynamics.

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A bimetallic strip, consisting of metal G on the top aiwo)d j6xwr+4 *sk.cjjs)0 dbj *ml8ind metal H on the bottom, is rigidly attached to a wall at the left. (See Fig. 13-1.) w)jjw6dk)l dj * soi+jxc0ms i*.b8r4The coefficient of linear thermal expansion for metal G is greater than that of metal H. If the strip is uniformly heated, it will

A. curve upward.

B. curve downward.

C. remain horizontal, but get longer.

D. bend in the middle.

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

When the engine of your car heats u++1pl mt 7tm;1 bl34wjkoc7u me jw-qop, the spark plug gap will

A. increase.

B. decrease.

C. remain unchanged.

D. decrease at first and then increase later, so that the two effects cancel once the engine reaches operating temperature.

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Consider a flat steel u ,zz1k 0w-fp+a m7.2pityesw plate with a hole through its center as shown in Fig. 13-2. When the plate's temperature is +fi .kp1-07uw2m y,saztzwep increased, the hole will

A. expand only if it takes up more than half the plate's surface area.

B. contract if it takes up less than half the plate's surface area.

C. always contract.

D. always expand.

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The coefficient of linear expansion for aluminum is b7 +r92i mlcn(gmn ck5$1.8 \times 10^{-6} \; ^{\circ}C^{-1}$. What is its coefficient of volume expansion?

A. $9.0 \times 10^{-6} \; ^{\circ}C^{-1}$

B. $5.8 \times 10^{-18} \; ^{\circ}C^{-1}$

C. $5.4 \times 10^{-6} \; ^{\circ}C^{-1}$

D. $3.6 \times 10^{-6} \; ^{\circ}C^{-1}$

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The surface water temperature on a large, de3.v jr(tc w+99 /dyjl ddvrk3ittzp.+ep lake is $3 \; ^{\circ}C$. A sensitive temperature probe is lowered several meters into the lake. What temperature will the probe record?

A. a temperature warmer than $3 \; ^{\circ}C$

B. a temperature less than $3 \; ^{\circ}C$

C. a temperature equal to $3 \; ^{\circ}C$

D. There is not enough information to determine.

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which temperature scale never gives negative temperat sgxkfnwu+; ) iw:q:d8ures?

A. Kelvin

B. Fahrenheit

C. Celsius

D. all of the above

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which two temperature changes arebu5u yf8d guhq.o y,/8 equivalent?

A. $1 ^{\circ}K = 1 ^{\circ}F$

B. $1 ^{\circ}F = 1 ^{\circ}C$

C. $1 ^{\circ}C = 1 ^{\circ}K$

D. none of the above

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The temperature in your classroom is u+suv8h9w-s9zym j b-approximately

A. $68 \; ^{\circ}K$

B. $68 \; ^{\circ}F$

C. $50 \; ^{\circ}C$

D. $295 \; ^{\circ}K$

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10#

问答题 ( 1.0 分) 切至整卷模式搜藏此题

State Boyle's law.

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11#

问答题 ( 1.0 分) 切至整卷模式搜藏此题

State Charles's law.;odcyy 93zo 1s4/uolf

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12#

问答题 ( 1.0 分) 切至整卷模式搜藏此题

State Gay-Lassac's law.3p+y:na rx4vj .leywytkq;4 )

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13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A container of an ideal gas at 1 atm (ugq ax2u:n*y+(hnha.ue-p fc* p:th is compressed to one-third its volume, with the temperature held constant. What isnph-+:p2(. yt(*uxuf u:gheh*aa n qc its final pressure?

A. $1/3 \; atm$

B. $1 \; atm$

C. $3 \; atm$

D. $9 \; atm$

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14#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

If the pressure acting on an ideal gas at constant x1opim1m tws6:(wg7 otemperature is tripled, its volumpwi1s t7xw og1:(6omm e is

A. reduced to one-third.

B. increased by a factor of three.

C. increased by a factor of two.

D. reduced to one-half.

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15#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

According to the ideal gas Law, PV = constant for a given tempera :-qgm cg:*m8p6aggokture. As a result, an og : 6ggmp*c 8gq:-makincrease in volume corresponds to a decrease in pressure. This happens because the molecules

A. collide with each other more frequently.

B. move slower on the average.

C. strike the container wall less often.

D. transfer less energy to the walls of the container each time they strike it.

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16#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The number of moleculeo. wnx mlye+y73kd; 3s0qye f0s in one mole of a substance

A. depends on the molecular weight of the substance.

B. depends on the atomic weight of the substance.

C. depends on the density of the substance.

D. is the same for all substances.

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17#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A container holds N mggo0 dwq6 gvr (k,n g/bf*0wm8olecules of an ideal gas at a given temperature. If the number of molecules in the container is increased to 2N with no change in temperature or volume, the pressure in the containfwq0m0 b8vn/ gd(g*gkog ,6wr er

A. doubles.

B. remains constant.

C. is cut in half.

D. none of the above

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18#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Both the pressure and volume of a givey1 xq sh30; p6ue17ogmgt.e -lapuki7syd *3 fn sample of an ideal gas double. This means that its temperature in Kelves1 u.0pelx6i gg*3h73mp7qo;a fkdt sy u-1yin must

A. double.

B. quadruple.

C. reduce to one-fourth its original value.

D. remain unchanged.

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19#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The temperature of an i/qb7djsz( jbj e c(f(9*pqa7 mj0;zz tdeal gas increases from $2 \; ^{\circ}C$ to $4 \; ^{\circ}C$ while remaining at constant pressure. What happens to the volume of the gas?

A. It decreases slightly.

B. It decreases to one-half its original volume.

C. It increases slightly.

D. It increases to twice as much.

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20#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A mole of diatomic oxygen molecules and a mole of diatomic nitrogen mb+uljl ,wza4x+2t9btj 5vz; aolecules at STP hztzl2 4a 59jt++aw l,ubx;b vjave

A. the same average molecular speeds.

B. the same number of molecules.

C. the same diffusion rates.

D. all of the above

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21#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Consider two equal volumes of gas at a giv0e g+h, vh;suo /*dazken temperature and pressure. One gas, oxygen, has a molecular mass of 32. The other gas, nitrogen, has a molecular mass of 28. What is the ratio of the number of oxygen molecules u gh0 +/;oaskdh*z,ev to the number of nitrogen molecules?

A. 32:28

B. 28:32

C. 1:1

D. none of the above

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22#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The average molecular kinetic energy of a gas can be determined by knoh(j5idijzr, + q4q, qvwing only

A. the number of molecules in the gas.

B. the volume of the gas.

C. the pressure of the gas.

D. the temperature of the gas.

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23#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A sample of an ideal gas is slowly compressed to one-half its origin6l.pwr) u*q6/tiviu pal volume with no change in temperature. What happens to the average speed of the molecules in thet./ 6i qv6*ir)uwlupp sample?

A. It does not change.

B. It doubles.

C. It halves.

D. none of the above

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24#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A sample of an ideal gas is heated cm hu15ih9zq8 ,pahf rh .zq (ct/87kyand its Kelvin temperature doubles. What happens to the average speed of the molecules in the samplek ru9hqmtc/qzhhz 58p8.fhc( 7y 1,ia?

A. It does not change.

B. It doubles.

C. It halves.

D. none of the above

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25#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The absolute temperature of an ideal gas is directly proportional to* 5sixd) lm9;m avpr6l which of thdx 6;ar9)ivl*mls5 pm e following?

A. speed

B. momentum

C. kinetic energy

D. mass

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26#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In order to double th /rt6yb-z/zztk1ashn*u a1c.e average speed of the molecules in a given sample of gas, the temperature *1zhr-6n atbc.1/ztsky zau/ (measured in Kelvin) must

A. quadruple.

B. double.

C. increase by a factor of square root two of its original value.

D. increase by a factor of square root three of its original value.

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27#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Oxygen molecules are 16 times more massive than hydrol-dc62f/r*v lek yd;hgen molecules. At a given temperature, the aver-r k*cd ; h2l/dly6vefage molecular kinetic energy of oxygen, compared to hydrogen

A. is greater.

B. is less.

C. is the same.

D. cannot be determined since pressure and volume are not given

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28#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Oxygen molecules are 16 times more massive than hydrogen molecules. At a giveb.3e f1u-sm nvn temperature, how do nm1 e3f-suvb. their average molecular speeds compare? The oxygen molecules are moving

A. 4 times faster.

B. at 1/4 the speed.

C. 16 times faster.

D. at 1/16 the speed.

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29#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A fixed container holds dx9 wuch evmhq/ -v ga/3a8e0;oxygen and helium gases at the same temperature. Which one of the foluwe90-g /; h8vm/ 3aadcqxvhelowing statements is correct?

A. The oxygen molecules have the greater kinetic energy.

B. The helium molecules have the greater kinetic energy.

C. The oxygen molecules have the greater speed.

D. The helium molecules have the greater speed.

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30#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A container is filled with a mixture of helium and oxygen gas k,*a z ojokat-wkn.58es. A thermometer in the container nw*.-kak85azto j k, oindicates that the temperature is $22 \; ^{\circ}C$. Which gas molecules have the greater average kinetic energy?

A. It is the same for both because the temperatures are the same.

B. The oxygen molecules do because they are diatomic.

C. The helium molecules do because they are less massive.

D. The helium molecules do because they are monatomic.

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31#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A container is filled with a mixture of hp bp0ibos/w8/0 o,ya pelium and oxygen gases. A thermometer in the container indicates that the temperature is0 ,ipb0obwopp8a//ys $22 \; ^{\circ}C$. Which gas molecules have the greater average speed?

A. The helium molecules do because they are monatomic.

B. It is the same for both because the temperatures are the same.

C. The oxygen molecules do because they are more massive.

D. The helium molecules do because they are less massive.

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32#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The three phases of matxrkmk21 bbl7x( sq;9pt bb6y ,ter can exist together in equilibrium at the

A. critical point.

B. triple point.

C. melting point.

D. evaporation point.

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33#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Supersaturation occurs in air 7k -jr2t5jtp o6eofs, when the

A. relative humidity is 100% and the temperature increases.

B. relative humidity is less than 100% and the temperature increases.

C. relative humidity is less 100% and the temperature decreases.

D. relative humidity is 100% and the temperature decreases.

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34#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Express your body temperat*:w;j zqaat/f ure ($98.6 \; ^{\circ}F$) in Celsius degrees.

A. $37.0 \; ^{\circ}C$

B. $45.5 \; ^{\circ}C$

C. $66.6 \; ^{\circ}C$

D. $72.6 \; ^{\circ}C$

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35#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Express $68 \; ^{\circ}F$ in $^{\circ}C$.

A. $7.0 \; ^{\circ}C$

B. $20 \; ^{\circ}C$

C. $36 \; ^{\circ}C$

D. $181 \; ^{\circ}C$

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36#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Express $-40 \; ^{\circ}C$ in $^{\circ}F$.

A. $-72 \; ^{\circ}F$

B. $-54 \; ^{\circ}F$

C. $40 \; ^{\circ}F$

D. $4.4 \; ^{\circ}F$

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37#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The temperature chang7 a*r4s8puzj3bzc, z bes from 35eF during the night to $75 \; ^{\circ}F$ during the day. What is the temperature change on the Celsius scale?

A. $72 \; ^{\circ}C$

B. $40 \; ^{\circ}C$

C. $32 \; ^{\circ}C$

D. $22 \; ^{\circ}C$

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38#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A temperature change of ;sbpr 0 , /q0gkuzp6fd$20 \; ^{\circ}C$ corresponds to a temperature change of

A. $68 \; ^{\circ}F$

B. $11 \; ^{\circ}F$

C. $36 \; ^{\circ}F$

D. none of the above

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39#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

At what temperature are the numerical readings on the Fahrenheigsu r6b(yzu+ 2t and Celsius scale6buu2(+ gsrzy s the same?

A. $-30^{\circ}$

B. $-40^{\circ}$

C. $-50^{\circ}$

D. $-60^{\circ}$

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40#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A steel bridge is 1000 m long atyzhm or j45.+,f 8ko4 tpfm;mb $-20 \; ^{\circ}C$ in winter. What is the change in length when the temperature rises to $40 \; ^{\circ}C$ in summer? (The average coefficient of linear expansion of steel is $11 \times 10^{-6} \; ^{\circ}C^{-1}$)

A. $0.33 \; m$

B. $0.44 \; m$

C. $0.55 \; m$

D. $0.66 \; m$

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41#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An aluminum rod 17.4 cn9w.of 9bx1 kim long at $20 \; ^{\circ}C$ is heated to $100 \; ^{\circ}C$. What is its new length? Aluminum has a linear expansion coefficient of $25 \times 10^{-6} \; ^{\circ}C^{-1}$.

A. $17.435 \; cm$

B. $17.365 \; cm$

C. $0.348 \; cm$

D. $0.0348 \; cm$

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42#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

By how much will a slab of concrete 18 m long contract when the temperaturev j14yughc ,z9 drops f9vhu1g yzcj4, rom $24 \; ^{\circ}C$ to -$16 \; ^{\circ}C$? (The coefficient of linear thermal expansion for concrete is $10^{-5} \; ^{\circ}C^{-1}$)

A. $0.50 \; cm$

B. $0.72 \; cm$

C. $1.2 \; cm$

D. $1.5 \; cm$

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43#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A bolt hole in a brass plqu l1 kazk-,is,-i/un y f0u4jate has a diameter of 1.200 cm at $20 \; ^{\circ}C$. What is the diameter of the hole when the plate is heated to $220 \; ^{\circ}C$? (The coefficient of linear thermal expansion for brass is $19 \times 10^{-6} \; ^{\circ}C^{-1}$)

A. $1.205 \; cm$

B. $1.195 \; cm$

C. $1.200 \; cm$

D. $1.210 \; cm$

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44#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

20.00 cm of space is avail21gmd2fa)7 hq *mok)5igs9guy o ggb)s. lj5oable. How long a piece of brass at $20 \; ^{\circ}C$ can be put there and still fit at $200 ^{\circ}C$? Brass has a linear expansion coefficient of $19 \times 10^{-6} \; ^{\circ}C^{-1}$.

A. $19.93 \; cm$

B. $19.69 \; cm$

C. $19.50 \; cm$

D. $19.09 \; cm$

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45#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A 5.0-cm diameter steel shaft has 0.10 mm clearance all around itse(lv28ln6k. kn, xlt1j+ntzu bushing at $20 \; ^{\circ}C$. If the bushing temperature remains constant, at what temperature will the shaft begin to bind? Steel has a linear expansion coefficient of $12 \times 10^{-6} \; ^{\circ}C^{-1}$.

A. $353 \; ^{\circ}C$

B. $333 \; ^{\circ}C$

C. $53 \; ^{\circ}C$

D. $680 \; ^{\circ}C$

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46#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

$400 \; cm^{3}$ of mercury at $0 \; ^{\circ}C$ will expand to what volume at $50 \; ^{\circ}C$? Mercury has a volume expansion coefficient of $180 \times 10^{-6} \; ^{\circ}C^{-1}$.

A. $450 \; cm^{3}$

B. $409.7 \; cm^{3}$

C. $403.6 \; cm^{3}$

D. $401.8 \; cm^{3}$

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47#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

1 L of water at $20 \; ^{\circ}C$ will occupy what volume at $80 \; ^{\circ}C$? Water has a volume expansion coefficient of $210 \times 10^{-6} \; ^{\circ}C^{-1}$.

A. $1.6 \; L$

B. $1.013 \; L$

C. $0.987 \; L$

D. $0.9987 \; L$

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48#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The volume coefficient of thermal expansion for qt,h ta c6(0/ zhl6k3ik.*ehmq wc5kigasoline is $950 \times 10^{-6} \; ^{\circ}C^{-1}$. By how much does the volume of 1.0 L of gasoline change when the temperature rises from $20 \; ^{\circ}C$ to $40 \; ^{\circ}C$?

A. $6.0 \; cm^{3}$

B. $12 \; cm^{3}$

C. $19 \; cm^{3}$

D. $37 \; cm^{3}$

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49#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A 500-mL glass beaker of water is filledf1 w mbe).m/ee to the rim at a temperature of $0 \; ^{\circ}C$. How much water will overflow if the water is heated to a temperature of $95 \; ^{\circ}C$? (Ignore the expansion of the glass and the coefficient of volume expansion of water is $2.1 \times 10^{-4} \; ^{\circ}C^{-1}$.)

A. $3.3 \; mL$

B. $10 \; mL$

C. $33 \; mL$

D. $100 \; mL$

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50#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

For mercury to expand f. p*xw3jy ce0qag cv7pdi:7k 5n-cek6 rom $4.0 \; cm^{3}$ to $4.1 \; cm^{3}$, what change in temperature is necessary? Mercury has a volume expansion coefficient of $180 \times 10^{-6} \; ^{\circ}C^{-1}$.

A. $400 \; ^{\circ}C$

B. $139 \; ^{\circ}C$

C. $14 \; ^{\circ}C$

D. $8.2 \; ^{\circ}C$

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51#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A mercury thermometer has a bu(pfk2n1sd,ppf e8 dv (lb of volume 0.100 $cm^{3}$ at $10 ^{\circ}C$. The capillary tube above the bulb has a cross-sectional area of 0.012 $mm^{2}$. The volume thermal expansion coefficient of mercury is $1.8 \times 10^{-4} \; ^{\circ}C^{-1}$. How much will the mercury rise when the temperature rises by $30 \; ^{\circ}C$?

A. $0.45 \; mm$

B. $4.5 \; mm$

C. $45 \; mm$

D. $45 \; cm$

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52#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Convert $14 \; ^{\circ}C$ to $^{\circ}K$.

A. $46 \; ^{\circ}K$

B. $100 \; ^{\circ}K$

C. $287 \; ^{\circ}K$

D. $474 \; ^{\circ}K$

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53#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Convert $14 \; ^{\circ}F$ to $^{\circ}K$.

A. $263 \; ^{\circ}K$

B. $287 \; ^{\circ}K$

C. $-10 \; ^{\circ}K$

D. $474 \; ^{\circ}K$

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54#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Convert $14 \; ^{\circ}K$ to $^{\circ}C$.

A. $46 \; ^{\circ}C$

B. $287 \; ^{\circ}C$

C. $25 \; ^{\circ}C$

D. -$259 \; ^{\circ}C$

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55#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Convert $14 \; ^{\circ}K$ to $^{\circ}F$.

A. $287 \; ^{\circ}F$

B. $-434 \; ^{\circ}F$

C. $-259 \; ^{\circ}F$

D. $474 \; ^{\circ}F$

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56#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Oxygen condenses into a s))as),xf vrx jsp98m) rhl; d 4ms;rfliquid at approximately 90 K. What temperature, in degrees Fahrenh4hv9sss)jrxprx;)m) fr8) samd l;, feit, does this correspond to?

A. $-193 \; ^{\circ}F$

B. $-217 \; ^{\circ}F$

C. $-265 \; ^{\circ}F$

D. $-297 \; ^{\circ}F$

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57#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An ideal gas occupies 300 L at an absolute pressure of 400 kPa. Fitzc4 +-pl: ieb*jl-i2ct1t .c k opn4nnd the absolute pressurbk+c *j1pt z:-tli-.2e44onictplnc e if the volume changes to 850 L and the temperature remains constant.

A. $140 \; kPa$

B. $640 \; kPa$

C. $850 \; kPa$

D. $1140 \; kPa$

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58#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Two liters of a perfect gas are5 vgg0k3vn oep *4q q3*owqvm2 at $0 \; ^{\circ}C$ and 1 atm. If the gas is nitrogen, $N_2$, determine the number of moles.

A. 0.37

B. 0.73

C. 0.089

D. 0.098

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59#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Two liters of a perfect gas are a d 0mbl3tg .yp;4cgfm.t $0 \; ^{\circ}C$ and 1 atm. If the gas is nitrogen, $N_2$, determine the number of molecules.

A. $3.5 \times 10^{22}$

B. $5.3 \times 10^{22}$

C. $4.7 \times 10^{22}$

D. $7.4 \times 10^{22}$

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60#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Two liters of a perfeys,p *xwh c 0 ex7,4/yajdc/zxct gas are at $0 \; ^{\circ}C$ and 1 atm. If the gas is nitrogen, $N_2$, determine the mass of the gas.

A. $2.5 \; g$

B. $2.7 \; g$

C. $2.9 \; g$

D. $3.1 \; g$

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61#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

How many water molecules are thnsy)8szu +(* )rqhchcere in 36 g of water? Express your answer as a multiple of Avogadro's number NA. (T*huy h scc)(q+8rz)n she molecular structure of a water molecule is $H_2 O$.)

A. $36 \; NA$

B. $2 \; NA$

C. $18 \; NA$

D. none of the above

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62#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

How many mol are there in 2.00 kg of cop08le , 7ak awmm3kngk6per? (The atomic weight of copper is 63.5 and its specific grav,k08awe6n mm7 l k3akgity is 8.90)

A. 15.3

B. 31.5

C. 51.3

D. 53.1

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63#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A sample of a diatomic ideal gas occupies 33.6 L under standplcx g4au o8i9 dll(4-ard conditions. How llocip 44g9au d(8-lxmany mol of gas are in the sample?

A. 0.75

B. 3.0

C. 1.5

D. 3.25

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64#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An ideal gas has a pressure of 2.5 atm, a volume of 1.*.q 3 fkul7x.grq lnt)0 L at a temperature of $30 \; ^{\circ}C$. How many molecules are there in the gas?

A. $6.1 \times 10^{23}$

B. $6.0 \times 10^{22}$

C. $2.4 \times 10^{22}$

D. $2.3 \times 10^{23}$

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65#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An ideal gas in a containemv;0.q lzl zlm jj0)m5r of volume $100 cm^{3}$ at $20 \; ^{\circ}C$ has a pressure of $100 \; N/m^2$. Determine the number of gas molecules in the container.

A. $4.2 \times 10^{6}$

B. $6.0 \times 10^{23}$

C. $2.5 \times 10^{18}$

D. $5.2 \times 10^{18}$

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66#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A sample of helium (He) occupies 44.8 L at STP. What is theh2te;qf gzuccq 4 hy;)r-ef,. mass of the sample?-f zq )r;e.hgu fth2yc,4;cqe

A. $2 \; g$

B. $4 \; g$

C. $6 \; g$

D. $8 \; g$

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67#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A 25-L container holds hydrogen gas at a gauge pressure of 0.25 atm and a t0 idqz:l++ i+- gzt 3j7rk8zhbjf uv7memperature ji7z qkvrhi+bj++3zf:-z7gm 08 ul tdof $0 \; ^{\circ}C$. What mass of hydrogen is in this container?

A. $1.4 \; g$

B. $2.8 \; g$

C. $4.2 \; g$

D. $5.6 \; g$

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68#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A $100-cm^{3}$ container has 4 g of ideal gas in it at 250 kPa. If the volume is changed to $50 \; cm^{3}$ and the temperature remains constant, what is its new density?

A. $400 \; kg/m^{3}$

B. $250 \; kg/m^{3}$

C. $80 \; kg/m^{3}$

D. $50 \; kg/m^{3}$

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69#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An ideal gas occupiesrcn x plsom/2to1 2z*b-*g*wx $600 \; cm^{3}$ at $20 \; ^{\circ}C$. At what temperature will it occupy $1200 \; cm^{3}$ if the pressure remains constant?

A. $10 \; ^{\circ}C$

B. $40 \; ^{\circ}C$

C. $100 \; ^{\circ}C$

D. $313 \; ^{\circ}C$

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70#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A constant pressure gas thermometer is initially aup/lx r kx7 zfkp3dsa: n,7s((t $28 \; ^{\circ}C$. If the volume of gas increases by 10%, what is the final Celsius temperature?

A. $31 \; ^{\circ}C$

B. $43 \; ^{\circ}C$

C. $58 \; ^{\circ}C$

D. $64 \; ^{\circ}C$

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71#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An ideal gas occupies c56y7trx f/- mer2jza4.0 L at $20 \; ^{\circ}C$. What volume will it occupy at $40 \; ^{\circ}C$ if the pressure remains constant?

A. $43 \; cm^{3}$

B. $4.3 \; L$

C. $8.0 \; L$

D. $2.0 \; L$

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72#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A balloon has a volume ofz0 / gnfmzc7)*crymz8 $1.0 \; m^{3}$. As it rises in the Earth's atmosphere, its volume expands. What will be its new volume if its original temperature and pressure are $20 \; ^{\circ}C$ and 1.0 atm, and its final temperature and pressure are -$40 ^{\circ}C$ and 0.10 atm?

A. $2.0 \; m^{3}$

B. $4.0 \; m^{3}$

C. $6.0 \; m^{3}$

D. $8.0 \; m^{3}$

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73#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A given sample of carbon k.r:3hrz.7 y, p5aw1ybpru-mv uv8awdioxide ($CO_2$) contains $3.01 \times 10^{23} \; molecules$ at STP. What volume does this sample occupy?

A. $11.2 \; L$

B. $22.4 \; L$

C. $44.8 \; L$

D. $32.7 \; L$

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74#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

$500 \; cm^{3}$ of ideal gas at $40 \; ^{\circ}C$ and 200 kPa (absolute) is compressed to $250 \; cm^{3}$ and cooled to $20 \; ^{\circ}C$

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75#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

$1500 \; cm^{3}$ of ideal gas at STP is cooled to -$20 \; ^{\circ}C$ and put into a $1000 \; cm^{3}$ container. What is the final gauge pressure?

A. $11 \; kPa$

B. $40 \; kPa$

C. $113 \; kPa$

D. $141 \; kPa$

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76#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An ideal gas has a densitsna-b z3e9*yjy of $1.75 \; kg/m^{3}$ at a gauge pressure of 160 kPa. What must be the gauge pressure if a density of $1.0 \; kg/m^{3}$ is desired at the same temperature?

A. $356 \; kPa$

B. $280 \; kPa$

C. $91 \; kPa$

D. $48 \; kPa$

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77#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An ideal gas has a vgowmyu+x4t o6(q,:bahj-*vb olume of $0.20 \; m^{3}$, a temperature of $30 \; ^{\circ}C$, and a pressure of 1.0 atm. It is heated to $60 \; ^{\circ}C$ and compressed to a volume of $0.15 \; m^{3}$. What is the new pressure?

A. $1.0 \; atm$

B. $1.2 \; atm$

C. $1.5 \; atm$

D. $2.7 \; atm$

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78#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A mixture of gases contains 15 g o8k 3y7, i4 6+gxwrggda atrlc-+llg2df $H_2$, 14 g of $N_2$, and 44 g of $CO_2$. The mixture is in a 40 L sealed container which is at $20 \; ^{\circ}C$. What is the pressure in the container?

A. $3.3 \times 10^{5} \; N/m^{2}$

B. $4.4 \times 10^{5} \; N/m^{2}$

C. $5.5 \times 10^{5} \; N/m^{2}$

D. $6.6 \times 10^{5} \; N/m^{2}$

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79#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What is the average separation betwe 8fx;(euwy yjjy(, s2ien air molecules at STP?

A. $3.34 \times 10^{-7} \; cm$

B. $4.33 \times 10^{-7} \; cm$

C. $5.32 \times 10^{-7} \; cm$

D. $5.23 \times 10^{-7} \; cm$

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80#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

At what temperature is t-pbssj2z( 0 1b4vq 2mkyhby4h/ukmc(/h;ye the average kinetic energy of an atom in helium gas equal mq2/b-h/ 0bes (y 4cu2p h(vhyb4ztk y1;mkjsto $6.21 \times
10^{-21} \; J$?

A. $200 \; K$

B. $250 \; K$

C. $300 \; K$

D. $350 \; K$

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81#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

At what temperature wx8l+ b24h 5vhyz vpl62oc*rk zould the rms speed of $H_2$ molecules equal 11,200 m/s (the Earth's escape speed)?

A. $102 \; K$

B. $104 \; K$

C. $106 \; K$

D. $108 \; K$

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82#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A cylinder contains 16 g of helium gas at STP. H:wn0sfk6+ lk aow much energy is needed to raise the temperaturwfk +al :k6n0se of this gas to $20 \; ^{\circ}C$?

A. $789 \; J$

B. $798 \; J$

C. $879 \; J$

D. $998 \; J$

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83#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

If the temperature of a gas is in dbl* )lql6s9ccreased from $20 \; ^{\circ}C$ to $40 \; ^{\circ}C$, by what factor does the speed of the molecules increase?

A. 3%

B. 30%

C. 70%

D. 100%

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84#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A molecule has a speed of 500 m/s at pfeb*d.n c6z n;gal 5z+u-4qb$20 \; ^{\circ}C$. What is its speed at $80 \; ^{\circ}C$?

A. 500 m/s

B. 550 m/s

C. 1000 m/s

D. 2000 m/s

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85#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The molecular mass of oxygen molecules is 32, h:8rq:x0m cmwand the molecular mass of nitrogen molecules is 28. If these:hqc:mw m8r0 x two gases are at the same temperature, the ratio of nitrogen's rms speed to that of oxygen is .

A. $\sqrt{8}:\sqrt{7}$

B. 8:7

C. $\sqrt{7}:\sqrt{8}$

D. 7:8

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86#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The molecular mass of nitrogen is 14 times greapi +hn;d,hatnw4 s,;qter than that of hydrogen. If the molecules in these twdns;p,+ahin ;, ht wq4o gases have the same rms speed, the ratio of hydrogen's absolute temperature to that of nitrogen is .

A. $\sqrt{14}:1$

B. $1:\sqrt{14}$

C. 1:14

D. 14:1

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