RepublicofthePhilippines
DepartmentofEducation
REGIONVIII
SCHOOLSDIVISIONOFEASTERNSAMAR
SULATNATIONALHIGHSCHOOL
SanFrancisco,Sulat,EasternSamar
initialconditionsandaskthemto
findtheunknownvalues(pressure
orvolume).
ExampleProblems:
Agashasavolumeof5.0Lata
pressureof1.2atm.Ifthevolumeis
decreasedto2.5L,whatwillbethe
newpressure?
Aballoonhasavolumeof3.0Lat
1.5atmpressure.Whatvolumewill
ithavewhenthepressureisreduced
to1.0atm?
Extension:Discussreal-world
applicationsofBoyle’sLaw,suchas
howdiversneedtounderstand
pressureandvolumewhen
descendingorhowacar'stiresare
affectedbyairpressure.
values(volumeortemperature).
ExampleProblems:
Agashasavolumeof2.0Lat273K.
Whatwillitsvolumebeat373K?
Agasisat1.0atmpressureandhasa
volumeof5.0Lat400K.Whatwillthe
volumebeat500K?
GroupDiscussion:Aftersolvingthe
problems,discusshowthevolume
changeswithtemperatureandwhatit
impliesforreal-worldapplicationslike
hotairballoons,tirepressurein
vehicles,orgasinengines.
Real-WorldApplication:Discussthe
behaviorofgasesineveryday
situations,suchashowahotairballoon
risesduetotheheatingofairinsideit,
orhowthevolumeofgasinacartire
canincreaseonahotday.
mapordiagramusingtheKinetic
MolecularTheorytoexplainoneofthe
gaslaws(Boyle’sLaw,Charles’Law,or
Gay-Lussac’sLaw).
Includetermssuchas:particles,motion,
collisions,energy,volume,pressure,
temperature.
Haveeachgrouppresenttheirdiagramto
theclass.
Extension:Useanonlinesimulation
(suchasPhETGasPropertiesSimulation)
wherestudentscanmanipulate
temperature,pressure,andvolumetosee
howthegasbehaviorchangesaccording
toKMTprinciples.
GuidingQuestions:
HowcantheKMTbeusedtoexplainthe
observedchangesingasbehaviorduring
yourexperiments?
Canyoupredictwhatwouldhappenifwe
changedthetemperatureorpressurein
moleculartheoryhelpusexplainthe
behaviorofgasesineverydaylife?
Howdogaslawshelpengineersdesign
systemslikepressurecookers,air
conditioning,orthetiresofacar?
Real-LifeConnection:Askstudentsto
researchandwriteashortessayonhowgas
laws(Boyle’s,Charles’,Gay-Lussac’s)
applytoreal-worldsituationslikeweather
balloons,scubadiving,orweather
prediction.