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习题练习：Physics Unit13: Temperature and Kinetic Theory
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 作者: admin    总分: 86分  得分: _____________

答题人: 游客未登录  开始时间: 22年08月07日 11:04  切换到: 整卷模式

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1#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State the zeroth law o,rr* klhtad 0(lsz03ef 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, by2ir m7m//zzffm /c, d5ad0q consisting of metal G on the top and metal H on the bottom, is rigidly attached to a wall at the left. (See Fig. 13-1.) The coefficient of linear thermal expansiac id0/f5yz z m /2mrqd/f7,mbon for metal G is greater than that of metal H. If the strip is uniformly heated, it will


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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 up, theh/dbhvdr(.q7g x9zm mx/h0o6 spark plug gap will

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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 plate with a hole throu o7 l:joihg(c 3ilg6j)gh its center as shown in Fig. 13-2. When the plate's temperature is increased, the hole6lj c3il 7):(goijo gh will


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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 aludlw6 olt7uw llu .uu .ns4j-)p9k(*uyhnv21r minum is $1.8 \times 10^{-6} \; ^{\circ}C^{-1}$. What is its coefficient of volume expansion?

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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 fohyk;xv . ;z,eg8gtt, +m-sna large, deep lake is $3 \; ^{\circ}C$. A sensitive temperature probe is lowered several meters into the lake. What temperature will the probe record?

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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 tempera-g r0rl qr/ej4tures?

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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 are equivalev2p e3:pily x1nt?

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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 approxia:ao1y6) .p 2qxqjnismately

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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. v5q i1ooj f-/68m.fl s jo2qv3h8quue
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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.uqh8a ).b h6sw3qt+ /n0ctft y
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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 ideaic8. ,kwc70 gthko4yljl(-p pl gas at 1 atm is compressed to one-third its volume, with the temperature held constant. What is its final pressure?7cl0yp84.pkgt(oikc,h wj- l

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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 ideg vor m3fk-fjhoy(5 12al gas at constant temperature is tripled, its vol1(h 3of-m2okvyr5jfg ume is

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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 = constfi-r9e; c7vwi ant for a given temperature. As a result, an increase in volum r 9wvi7e-c;ife corresponds to a decrease in pressure. This happens because the molecules

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The number of molecules in one mole of a substance6k*xd2vuybu05 gt qh :oid64 e

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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 molecules of an ideal gas at a given tempesva/-80xqv33 frl8 bbp*b kn brature. If the number o3alvpb bx3nf-vk/*br 0qs8 8bf molecules in the container is increased to 2N with no change in temperature or volume, the pressure in the container

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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 given samp:qjuj60nk;u o-e b5; 1rok olple of an ideal gas double. This means tha l6kub; ;jr:oj1o5 ku0noeqp-t its temperature in Kelvin must

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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 ideal gas i9rfb 7ob+0h7c m) fokbt:d(grncreases from $2 \; ^{\circ}C$ to $4 \; ^{\circ}C$ while remaining at constant pressure. What happens to the volume of the gas?

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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 mok xvuj9j4 6g3mx29pj elecules atj9gv m6 xxjje4p9ku32 STP have

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider two equal vol+u yjlw 5ov+1numes of gas at a given temperature and pressure. One gas, oxygen, has a molecular y+1louv 5n jw+mass of 32. The other gas, nitrogen, has a molecular mass of 28. What is the ratio of the number of oxygen molecules to the number of nitrogen molecules?

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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 k9wmn.upp k)x:(k/y menergy of a gas can be determined by knowing only

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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 itxn/5hb/ovh9az+ w s0 4hux 9tis original volume with no change in temperature. What happ h45nwx/ht/h0b9as +vuoi9xzens to the average speed of the molecules in the sample?

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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 and its Kelvin temperature doub2z8,psrcxznw 9,dyt,la + y9jles. What happens to the average speed of the molecules inpzts 8 dr9,+cz9 yl2y,nwaxj, the sample?

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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 proportiona.lej 4v/9grv fujd /c9l to which of the follove.d/94lfuj / jgv9rc wing?

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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 the average speed of the mpt0 9 0bizh0haab+ j j)45tsfmolecules in a given sample of gas, the temperature (measuat00p)jibh tb 5j9f0a+zm sh4red in Kelvin) must

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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 hydatb:q+ 8g4wsmk;en,y dc-e w2 rogen molecules. At a given temperature, the average molecular kinetic e2g+a;c qmn48d: ,ebwws ek -ytnergy of oxygen, compared to hydrogen

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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 i;pr,w 5aw+uhl+j5kbmolecules. At a given temperature, how do their average molecular speeds compare? The oxygen moleculep5i,whulw ajkr+;+5b s are moving

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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 oxygen and helium gase-gfod48d1pvl s at the same temperature. Which one of the g8dfl1-p4odv following statements is correct?

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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 oxnt .d8g w9i/bkygen gases. A thermometer in the container k w/gbn.di89tindicates that the temperature is $22 \; ^{\circ}C$. Which gas molecules have the greater average kinetic energy?

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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 :34 e ctqf mvz9tqg.e+helium and oxygen gases. A thermometer in thcz+qfg v:mt9 eq3e t4.e container indicates that the temperature is $22 \; ^{\circ}C$. Which gas molecules have the greater average speed?

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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 matter can exist togemledp gduc ;c/4n 2*0dther in equilibrium at the

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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 (vbf 1 pdjaihx4+y15wwhen the

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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Express your body te-dqcc-9)la 6uu l ob*/vp) k bv9bmt)rmperature ($98.6 \; ^{\circ}F$) in Celsius degrees.

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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 $^{\circ}C$.

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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 $^{\circ}F$.

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The temperature changes from 35eF during the 7a udtsp;h-hyiy0f 9 d3mt.+qnight to $75 \; ^{\circ}F$ during the day. What is the temperature change on the Celsius scale?

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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 aq/)wh1egp 0xg, flrfj4it;p6fd s;( $20 \; ^{\circ}C$ corresponds to a temperature change of

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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 tf1 c8-ap biox: ev-l/yhe Fahrenheit and Celsius scales the samelev- a:cb-1ofxp 8 yi/?

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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 ak;ohhn w0dmv o9g8e.ya4xes* vr;.z+ t $-20 \; ^{\circ}C$ 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 $11 \times 10^{-6} \; ^{\circ}C^{-1}$)

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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 cm loj9jwx bo43 .king at $20 \; ^{\circ}C$ is heated to $100 \; ^{\circ}C$. What is its new length? Aluminum has a linear expansion coefficient of $25 \times 10^{-6} \; ^{\circ}C^{-1}$.

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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 contl mzq8n4bn 9 nn8dxc31ract when the temperature drops from nb qn893d mxnc48lzn1$24 \; ^{\circ}C$ to -$16 \; ^{\circ}C$? (The coefficient of linear thermal expansion for concrete is $10^{-5} \; ^{\circ}C^{-1}$)

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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 plate has a diameter of 1.2eiv.4/: fw4 wue i( z*yivkwa(00 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 $19 \times 10^{-6} \; ^{\circ}C^{-1}$)

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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 available. How long a piec4ent+g3s/ m4iswi.vq e of brass at $20 \; ^{\circ}C$ can be put there and still fit at $200 ^{\circ}C$? Brass has a linear expansion coefficient of $19 \times 10^{-6} \; ^{\circ}C^{-1}$.

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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 syez,/(-8o vazbgps q0 haft has 0.10 mm clearance all around its 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 $12 \times 10^{-6} \; ^{\circ}C^{-1}$.

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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 $180 \times 10^{-6} \; ^{\circ}C^{-1}$.

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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 $210 \times 10^{-6} \; ^{\circ}C^{-1}$.

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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 gasolil z xv(yp9a038pcn .qqne 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 $40 \; ^{\circ}C$?

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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 filled to the 2 mm u3jb 7i8zz8tr0/q e p13w,hmwfkwrim 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 $2.1 \times 10^{-4} \; ^{\circ}C^{-1}$.)

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For mercury to expan(ks, ztku(f2gsgmx +ok-*t:o kl4 v,dd from $4.0 \; cm^{3}$ to $4.1 \; cm^{3}$, what change in temperature is necessary? Mercury has a volume expansion coefficient of $180 \times 10^{-6} \; ^{\circ}C^{-1}$.

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51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A mercury thermometer o w+j-bifk8d)has a bulb 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 $30 \; ^{\circ}C$?

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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 $^{\circ}K$.

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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 $^{\circ}K$.

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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 $^{\circ}C$.

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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 $^{\circ}F$.

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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 liquid at approximately 90lkz +yg556q: imtgwmi+ ( y-ns K. What temperature, in degr y+wiy5 :s gmml5-(zgq6tk+n iees Fahrenheit, does this correspond to?

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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 absolutlci ( ;*quj)gc lr3xh0e pressure of 400 kPa. Find the absolute pressure if the volume chauqc(rij3xc h)gl;l0 *nges to 850 L and the temperature remains constant.

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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 ar zwq c7r *4z:6apitrj+e at $0 \; ^{\circ}C$ and 1 atm. If the gas is nitrogen, $N_2$, determine the number of moles.

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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 ai u6b9; 19dcevdv lo9ut $0 \; ^{\circ}C$ and 1 atm. If the gas is nitrogen, $N_2$, determine the number of molecules.

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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 perfect gas z o4ctl7e3-vrs* dzz(t5 aqk4 are at $0 \; ^{\circ}C$ and 1 atm. If the gas is nitrogen, $N_2$, determine the mass of the gas.

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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 there in 36 g of water? Express your answ0)l)e188gq i yixk oiq+st.r per as a multiple of Avo qyl +isp.1qi i8groxe)t0) k8gadro's number NA. (The molecular structure of a water molecule is $H_2 O$.)

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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 copper? (The atomic weight ofzz3t62 cji* a9* y0fsozawydv mf*7wa /j7n/m copper is 63.5 and its specific gravity is 8.y*zzomjaw s/6it73nfmyc9vfd2 z 0*/7*aw aj 90)

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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 standard conditihd -moxb3 3(ow73xuz wons. How many mol of gas are in the sam-zd37xumo hoxww 33(bple?

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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 1.0 L at a temperature o oejlthq/ ,wg 5.q+;iuf $30 \; ^{\circ}C$. How many molecules are there in the gas?

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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 containe-d w1sza3ei)t , 6wgkpr 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.

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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 4djz:ibw25ni STP. What is the mass of the sample? 45diwzb j2:in

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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.b;d22/ xdqw4hj hh8pp 25 atm and a temperatur/hdxphp2hqwb d2j ;48 e of $0 \; ^{\circ}C$. What mass of hydrogen is in this container?

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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?

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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An ideal gas occupiew/5t d8 vt+azts $600 \; cm^{3}$ at $20 \; ^{\circ}C$. At what temperature will it occupy $1200 \; cm^{3}$ if the pressure remains constant?

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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 initytax7gt7i22n3z *)rdxr i5 cuially at $28 \; ^{\circ}C$. If the volume of gas increases by 10%, what is the final Celsius temperature?

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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 4.0 5 g5gwm/);9t3js2zo t) t0zt ezda pptL at $20 \; ^{\circ}C$. What volume will it occupy at $40 \; ^{\circ}C$ if the pressure remains constant?

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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 ofgrd/i;ndrd;p.fv p z :ok 5kh/+* wl8o $1.0 \; m^{3}$. 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?

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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 carbr4;hxg;+9s9 qwybkkbp5b x /x on dioxide ($CO_2$) contains $3.01 \times 10^{23} \; molecules$ at STP. What volume does this sample occupy?

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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?

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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 dens . 9icyaxbc e,dv,k-/sity 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?

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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 volume of //p5+by6(yvz hxon re/grb u 7$0.20 \; m^{3}$, 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?

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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 cons,zy8ryytx 6 g5k9jnm s)/:g gtains 15 g of $H_2$, 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?

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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 separatt llfi 4kzx ;ojub+r,fld48 vx3, hs-;(vw/qoion between air molecules at STP?

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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 the average kinetic energy of an atom in sic* c.ob.v5 b-d,vgho6hcf3ps e 66khelium gas equal -h6gv,e ch isd 6ofpb.6*3v sck.b5coto $6.21 \times
10^{-21} \; J$?

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81#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  At what temperature would the rm-y+y 9o-q uloha( tb6ps speed of $H_2$ molecules equal 11,200 m/s (the Earth's escape speed)?

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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 hel jr6 osy;c/5igna xm2/ium gas at STP. How much energy is needed to raise the temperature of ;j5mn/ gci6yrx o/a2s this gas to $20 \; ^{\circ}C$?

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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 increas zz/hb z;bvw 4l75(z1oi-dbybed from $20 \; ^{\circ}C$ to $40 \; ^{\circ}C$, by what factor does the speed of the molecules increase?

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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 of7 qtbcez:p9b rh. he30 500 m/s at $20 \; ^{\circ}C$. What is its speed at $80 \; ^{\circ}C$?

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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, and thuxe1;q;0u i*9 h ocsljce,th.e molecular mass of nitrogen molecules is 28. If these two gases are at the same temperature, the ratio of nitrogen's rh0c,1j eclhutxs9 *q ;i;uo.ems speed to that of oxygen is .

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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 greater thvj;p2fhu w*9 nan that of hydrogen. If the molecules in these two gases u2h9wnpjfv ;* have the same rms speed, the ratio of hydrogen's absolute temperature to that of nitrogen is .

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