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1、化學(xué)反應(yīng)速率化學(xué)平衡練習(xí)題（Chemicalreactionratechemicalbalanceexercises）ChemicalreactionratechemicalbalanceexercisesFirst,multiple-choicequestions(thereisonlyoneoptionforeachquestion)1.(08yearsShandongheald?14)underhightemperature,areactiontoreachequilibrium,theequilibriumconsta
2、nt.Atconstantvolume,theH2concentrationdecreaseswiththeincreaseoftemperature.ThefollowingstatementiscorrectA.theenthalpyofthereactionbecomespositiveUndertheconstanttemperatureandconstantvolumeofB.,theH2concentrationwilldecreasewiththeincreaseofpressureThereversereact
3、ionratedecreaseswiththeincreaseofC.ThereactionforD.chemicalformulaCO2H2CO+H2O2.(09yearsAnhuiheald?11)asareactiontothepurificationofautomobileexhaustgases:NO(g)CO(g)12N2(g)CO2(g)H=-373.4kJmol-1?.Inaclosedvesselwithconstantvolume,whenthereactionreachesequilibrium,acer
4、tainconditionischanged:3.(09yearsofShandongscience14?)2SO2(g)+O2(g)2SO3(g)isanimportantreactioninsulfuricacidpreparation.ThefollowingstatementiscorrectTheA.catalystV2O5doesnotchangethereversereactionrateofthereactionThepressureandreactionrateofthereactionsystemincre
5、asedwiththeincreaseofB.C.thereactionisexothermic,reducingthetemperaturewillshortentheequilibriumtimeofreactionTheconcentrationofSO3(g)atT1andT2isC1,C2,andtheaveragerateofSO3(g)isv=(c2-c1)/(t2-t1)whenthetimeintervalisT1toT2inD.4.inaclosedvesselundercertainconditions,
6、thefollowingreactionsarecarriedout:NO(g)+CO(g)N2(g)+CO2(g);DeltaH=-373.2kJ/molInordertoimprovethereactionrateandshortentheequilibriumtime,thefollowingmeasuresarenotadvisableA.addition(positive)catalystB.increasesthepressure(volumedecrease)C.heatingD.toremovepartofCO
7、2continuouslyfromthesystem5.areversiblereactionofA(g)+3B(g)2C(g)inafixedvolumeclosedvesselatacertaintemperaturecanbeachievedIt'sasignthatthereactionisbalancedTheconcentrationratioofA.A,BandCwas1:3:2Generating3NmolAatthesametimegeneratingnmolBinB.perunittimeGeneratin
8、g2nmolAatthesametimegeneratingnmolCinC.perunittimeThedensityofD.mixturesremainsconstant6.inaclosedvessel,afterthereactionaA(g)bB(g)reached
