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BIOCH499A (11)
Chapter 1

CHAPTER 1 NOTES.docx

49 Pages
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Department
Biochemistry
Course Code
BIOCH499A
Professor
Gail Amort- Larson

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Description
CHAPTER1NOTES07092013ChemistrystudyofmatteritspropertieschangeschemicalphysicalandenergytoaccommodatechangeMatteriscomposedofphysicalandchemicalpropertiesPhysicalpropertieschangesitselfwithoutinteractionwithanothersubstancephysicalchangechemicalcompositionremainsconstantChemicalpropertiesshownasreactantsinteractwitheachotherchangechangeinchemicalcompositionwaterhydrogenoxygenThreeStatesofMatterSolidfixedvolumeandshapeNOTdefinedbyrigidityorhardnessparticleslienexttoeachotherLiquidfixedvolumebutnotfixedshapeparticlesclosebutmoverandomlyGasnofixedvolumeorshapeparticlesfarapartandrandommovementPhysicalchangescanbereversedbytheadditiontakingawayofheatchemicalnotSampleProblems12aPbCmanybiochemicalreactionscCdPevaporationeCoxidationreactionEnergyTotalenergyanobjectpossessesisthesumofEpandEkPotentialenergyviapositionKineticenergyviamotionEnergyisalwaysconservedchangesformsbutneverdestroyedliftingweightsexampleEpincreasesasyouliftEkincreasesasyouletdownLowerEpisconsideredmorestablelessenergyisalwaysmorestableChangeinEpchangeinEkSeparatingoppositechargesworkmustbedoneandthuswhenseparatedEpisincreasedFuelsandfoodshavehigherpotentialenergiesthantheirwasteproductsenergylostasheatAlchemicalTraditionchemicalcompositioncanbealteredmagicallyMedicalTraditionintroductionofmineraldrugstopharmacyTechnologicalTraditionmakethingswounderstandingThephlogistontheorydominatedthinkingaboutcombustionforalmost100yearsuntilLavoisiershowedthatoxygenacomponentofairisrequiredforcombustionandcombineswithasubstanceasitburnsTheScientificApproachLabshelptobuildquantitativetheoriesObservationquantitativequalitativedataHypothesishelpstoexplainobservationExperimentinvolvestwovariablesandcontrolledsothatonevariableaffectsanotherModelbuildtheoriestoexplainresultstheoriesrefinedifconflictsoccurChemicalProblemSolvingAllmeasuredquantitiesconsistofanumberandaunitpersonsheightis6feetnot6Conversionfactorsratiosusedtoexpressameasuredquntitityindifferentunits1mi5280ftsuboutbeginningunittogetfinalunitProblemPlanhowtotacklethisproblemfindclaritySolutionsolveChecklookoverCommentadditioninfoFollowupProblemlookforsimilarproblemsSampleProblem13015ft325cm325x1in254cm128in128inx1ft12in107ft107ft015ft160SIUNITSAllotherunitsarecondieredderivedunitsegmsOftentimesSIunitswillbewritteninpowersof10egmvskmvsnmVolumeunitscubicmetreLmLMASSVSWEIGHTKggramsmassremainscostantwhileweightisamassgravitationalfieldstrengthElectronicscalesmeasuremassbygeneratinganelectricfieldthatcounteractsgravFieldDensitydisthemassvolumekgLorkgm3densitylikevolumechangeswithtemperature
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