EXERCISE FROM PP.docx
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EXERCISE FROM PP.docx
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EXERCISEFROMPP
___84.Thechangefromthesolidphasedirectlytothegaseousphaseiscalled
(1)sublimation;
(2)evaporation;(3)condensation;(4)crystallization.
___85.Asampleofhydrogenhasavolumeof100millilitersatapressureof1atmosphere.
Ifthetemperatureiskeptconstantandthepressureisraisedto2atmospheres,the
volumewillnowbe
(1)25mL;
(2)50mL;(3)100mL;(4)200mL.
___86.Aliquidwhichevaporatesrapidlyatroomtemperaturewouldmostlikelyhavea
high
(1)vaporpressure;
(2)boilingpoint;(3)meltingpoint;(4)attraction
betweenmolecules.
___87.
Exothermicreactionsareusuallyself-sustainingbecause
(1)exothermicreactions
usuallyrequirelowactivationenergies;
(2)exothermicreactionsusuallyrequire
highactivationenergies;(3)theenergyreleasedissufficienttomaintainthereaction;
(4)theproductscontainmorepotentialenergythanthereactants.
___88.Ifthetemperatureofasubstancechanges40Celsiusdegrees,howmanydegrees
woulditstemperaturechangeontheKelvinscale?
(1)40;
(2)233;(3)273;
(4)313.
___89.
Sublimationisachangedirectlyfromthe
(1)solidphasetothegaseousphase;
(2)solidphasetotheliquidphase;(3)liquidphasetothegaseousphase;(4)gaseous
phasetotheliquidphase.
___90.
Atapressureofoneatmospherethetemperatureofamixtureoficeandwaterat
equilibriumwouldbe
(1)25°K;
(2)32°K;(3)273°K;(4)298°K.
___91.
AliterofchlorineatS.T.P.hasamassofapproximately
(1)1;
(2)1.5;(3)3;
(4).3.
___92.When25gramsofwateriscooledfrom20°Cto10°Cthenumberofcaloriesofheat
MatterandEnergy
page6of10
energyreleasedis
(1)10;
(2)25;(3)200;(4)250.
___93.Inaclosedsystemthevaporpressureforwaterishighestatatemperatureof
(1)-40°C;
(2)0°C;(3)20°C;(4)30°C.
___94.
Whichischaracteristicofacompound?
(1)Itcanconsistofasingleelement;
(2)It
ishomogeneous;(3)Itschemicalcompositioncanbevaried;(4)Itcanbedecomposed
byaphysicalchange.
___95.
Whichisaformulaofabinarycompound?
(1)BaSO4;
(2)BiPO4;(3)MgCl2;
(4)Mg(ClO)2.
___96.Whichsubstancecanbedecomposedbyachemicalchange?
(1)ammonia;
(2)argon;
(3)iron;
(4)helium.
___97.
WhichKelvintemperaturesrepresent,respectively,thenormalfreezingpointand
thenormalboilingpointofwater?
(1)0°Kand273°K;
(2)0°Kand100°K;
(3)100°Kand273°K;(4)273°Kand373°K.
___98.
AtSTP,equalvolumesofN2(g)andCO2(g)containequalnumbersof
(1)atoms;
(2)electrons;(3)molecules;(4)protons.
___99.
Thevolumeof50.0millilitersofanidealgasatSTPincreasesto100.milliliters.If
thepressureremainsconstantthenewtemperaturemustbe
(1)0°K;
(2)100°K;
(3)273°K;(4)546°K.
___100.WhichgashasthegreatestdensityatSTP?
(1)oxygen;
(2)helium;(3)krypton;
(4)nitrogen.
___101.Asthetemperatureofaliquidincreasesitsvaporpressure
(1)decreases;
(2)increases;(3)remainsthesame.
___102.Atconstanttemperature,which10mLsample,measuredatSTP,willuniformly
taketheshapeandvolumeofa100mLcontainerintowhichitisplaced?
(1)water;
(2)mercury;(3)sodiumchloride;(4)carbondioxide.
___103.
Whichsamplerepresentsahomogeneousmixture?
(1)C2H5OH(l);
(2)C2H5OH(aq);
(3)C2H5OH(g);(4)C2H5OH(s).
___104.Whichgasunderhighpressureandlowtemperaturehasabehaviorclosesttothat
ofanidealgas?
(1)H2(g);
(2)O2(g);(3)NH3(g);(4)CO2(g).
___105.Whatisthevolumeof4.40gramsofCO2atSTP?
(1)2.24L;
(2)4.48L;(3)22.4
L;(4)44.8L.
___106.Underthesameconditionsoftemperatureandpressurewhichofthefollowing
gaseswouldbehavemostlikeanidealgas?
(1)He(g);
(2)NH3(g);(3)Cl2(g);
(4)CO2(g).
___107.Inanequationwhichsymbolwouldindicateamixture?
(1)NH3(s);
(2)NH3(l);
(3)NH3(aq);(4)NH3(g).
___108.GiventheequilibriumH2O(s)<======>H2O(l)atapressureof1atmosphere.The
temperatureoftheice-watermixturemustbe
(1)0°C;
(2)32°C;(3)110°C;
MatterandEnergy
page7of10
(4)212°C.
___109.Whenthevaporpressureofaliquidinanopencontainerequalstheatmospheric
pressurethentheliquidwill
(1)freeze;
(2)crystallize;(3)melt;(4)boil.
___110.Inaclosedsystem,asthetemperatureofaliquidincreases,thekineticenergyof
itsmolecules
(1)decreases;
(2)increases;(3)remainsthesame.
___111.Asampleofoxygengashasavolumeof150millilitersat300°K.Ifthepressureof
thesampleisheldconstantandthetemperatureisraised600°Kthenewvolumeof
thesamplewillbe
(1)75.0mL;
(2)150.mL;(3)300.mL;(4)600.mL.
___112.AflaskcontainingmoleculesofgasAandaseparateflaskcontainingmoleculesof
gasBarebothatthesametemperature.GasesAandBmusthaveequal
(1)volumes;
(2)masses;(3)pressures;(4)averagekineticenergies.
___113.AsampleofH2(g)andasampleofN2(g)atSTPcontainthesamenumberof
molecules.Eachsamplemusthave
(1)thesamevolume,butadifferentmass;
(2)thesamemass,butadifferentvolume;(3)boththesamevolumeandthesame
mass;(4)neitherthesamevolumenorthesamemass.
___114.Waterwillboilatatemperatureof29°Cifthepressureonthesurfaceofthewater
is
(1)4.6mMofHg;
(2)30.0mMofHg;(3)92.5mMofHg;(4)760.0mMofHg.
___115.Howmanycaloriesofheatenergyarereleasedwhen50gramsofwaterarecooled
from70°Cto60°C?
(1)10calories;
(2)50calories;(3)500calories;(4)1,000
calories.
___116.Whichtemperatureisthesameas-13°C?
(1)260°K;
(2)286°K;(3)747°K;
(4)773°K.
___117.Whichsubstancecannotbedecomposedbyachemicalchange?
(1)mercuric
oxide;
(2)potassiumchlorate;(3)water;(4)copper.
___118.Agasoccupiesavolumeof30mLat273°K.Ifthetemperatureisincreasedto364
°Kwhilethepressureremainsconstantwhatwillbethevolumeofthegas?
(1)60
mL;
(2)40mL;(3)30mL;(4)20mL.
___119.At1atmospherewhichsubstancewillsublimewhenheated?
(1)CO2(s);
(2)H2O(l);
(3)CH4(g);(4)HCl(aq).
___120.Asagivenvolumeofgasiscompressedthenumberofmolecules
(1)decreases;
(2)increases;(3)remainsthesame.
___121.AsampleofH2O(l)at20°Cisinequilibriumwithitsvaporinasealedcontainer.
Whenthetemperatureincreasesto25°Ctheentropyofthesystemwill
(1)decrease;
(2)increases;(3)remainthesame.
___122.Asa1gramsampleofH2O(l)changestoH2O(g)at100°Cthepotentialenergyof
themolecules
(1)decreases;
(2)increases;(3)remainsthesame.
___123.Asealedflaskcontains1moleofhydrogenand3molesofheliumat20°C.Ifthe
totalpressureis400torrthepartialpressureofhydrogenis
(1)100torr;
(2)200
torr;(3)300torr;(4)400torr.
MatterandEnergypage8of10
___124.Asampleofnitrogencontaining0.25moleshasthesamenumberofmoleculesasa
samplecontaining
(1)1.0moleofH2;
(2)2.0molesofHe;(3)0.25moleofO2;
(4)0.50moleofNe.
___125.Whichtermrepresentsthechangeofasubstancefromthesolidphasetotheliquid
phase?
(1)condensation;
(2)vaporization;(3)evaporation;(4)fusion.
___126.Underwhichconditionsdoesarealgasbehavemostlikeanidealgas?
(1)athigh
temperaturesandlowpressures;
(2)athightemperaturesandhighpressures;
(3)atlowtemperaturesandlowpressures;(4)atlowtemperaturesandhigh
pressures.
___127.Astudentdeterminedthemeltingpointofasubstancetobe55.2degreesCelsius.
Iftheacceptedvalueis50.1degreesCelsiusthenthepercenterrorinherdetermination
is
(1)5.10;
(2)9.24;(3)10.2;(4)12.0.
___128.Usingtherulesforsignificantfiguresthesumof0.027gramand0.0023gram
shouldbeexpressedas
(1)0.029gram;
(2)0.0293gram;(3)0.03gram;(4)0.030
gram.
___129.A1-literflaskcontainstwogasesatatotalpressureof3.0atmospheres.Ifthe
partialpressureofoneofthegasesis0.5atmospherethenthepartialpressureof
theothergasmustbe
(1)1.0atm;
(2)2.5atm;(3)1.5atm;(4)0.50atm.
___130.Whichofthefollowingbestdescribesexothermicchemicalreactions?
(1)They
neverreleaseheat;
(2)Theyalwaysreleaseheat;(3)Theyneveroccurspontaneously;
(4)Theyalwaysoccurspontaneously..
___131.Whatisthetotalnumberofmoleculesin1.0moleofCl2(g)?
(1)35;
(2)70;
(3)6.0x1023;(4)12x1024.
___132.Thenumberofcaloriesneededtoraisethetemperatureof10gramsofwaterfrom
20°Cto30°Cis
(1)10;
(2)20;(3)100;(4)40.
___133.Theheatoffusionforiceis80caloriespergram.Adding80caloriestoonegramof
iceatSTPwillcausetheiceto
(1)increaseintemperature;
(2)decreasein
temperature;(3)changetowateratahighertemperature;(4)changetowaterat
thesametemperature.
___134.Whichofthefollowingsubstancesismostsolubleat60°C?
(1)NH4Cl;
(2)KCl;
(3)NaCl;(4)NH3.
___135.Asthepressureonasampleofgasincreasesatconstanttemperature,thevolume
ofthegas
(1)decreases;
(2)increases;(3)remainsthesame.
___136.Whichistheformulaofabinarycompound?
(1)KOH;
(2)NaClO3;(3)Al2S3;
(4)Bi(NO3)3.
___137.Whichofthefollowingsubstancesismadeupofparticleswiththehighestaverage
kineticenergy?
(1)Fe(s)at35°C;
(2)Br2(l)at20°C;(3)H2O(l)at30°C;
(4)CO2(g)at25°C.
___138.Solidsubstancesaremostlikelytosublimeiftheyhave
(1)highvaporpressures
MatterandEnergypage9of10
andstrongintermolecularattractions;
(2)highvaporpressuresandweak
intermolecularattractions;(3)lowvaporpressuresand
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