ACTUAL h2024 hAQA hA-LEVEL hPHYSICS h7408/2
hPAPER h2 hMERGED hQUESTION hPAPER h+
hMARK hSCHEME
what his hmeant hby hspecific hheat hcapacity h- hanswersthe henergy hneeded hto hraise
hthe htemperature hof h1kg hof hmaterial hby h1C.
define havogadro's hconstant h- hanswersthe hnumber hof hatoms hin h12g hof hcarbon h12
h(OR hthe hno. hof hparticles/atoms hin hone hmole hof ha hsubstance)
define hthe hspecific hlatent hheat hof hvaporisation hof hwater h- hanswersthe henergy
hrequired hto hchange hthe hstate hof ha hunit hmass hof hwater hto hgas h(1) hwithout ha
hchange hin htemperature h(1)
features hof han hideal hgas h(3) h- hanswers- hcollisions hare helastic
- hmolecules hhave hnegligible hvolume
- hgas hobeys hideal hgas hlaw h(Boyles hlaw)
assumptions hmade hin hthe hmolecular hkinetic htheory hof han hideal hgas h- hanswers- hall
hmolecules hare hidentical h
- hmolecules hin hrandom hmotion
- hnewtonian hmechanics happly
- hvol hof hgas hmolecules hnegligible h(compared hto hvol hof hgas)
- hcollisions hare helastic
state hand hexplain hwhat hhappens hto hthe hspeed hof hmolecules hin ha hgas hwhen hthe
htemperature hincreases h- hanswersthe haverage/mean hspeed hof hmolecules hincreases
h(1) has hmean hke hproportional hto habsolute htemp
state hwhat his hmeant hby han helastic hcollision h- hanswersa hcollision hin hwhich hke his
hconserved
two hdifferent hgases hat hthe hsame htemp hhave hmolecules hwith hdifferent hmean
hsquare hspeeds. hexplain hhow hthis his hpossible h- hanswersmasses hare hdifferent h(1)
hbut hbecause hke hsame, hmean hsquare hspeeds hmust hbe hdifferent
why hdoes hthe htotal hke hof han hideal hgas hequal hthe htotal hinternal henergy hof han
hideal hgas h- hanswersmolecules hhave hno hpotential henergy h(1) hno helastic hcollisions
hoccur
Explain hwhat his hmeant hby hthe hbinding henergy hof ha hnucleus h- hanswersthe henergy
hrequired hto hsplit hup hthe hnucleus h(1) hinto hindividual hnucleons h(1)
3 hsources hof hbackground hradiation h- hanswersRocks h(1)
hPAPER h2 hMERGED hQUESTION hPAPER h+
hMARK hSCHEME
what his hmeant hby hspecific hheat hcapacity h- hanswersthe henergy hneeded hto hraise
hthe htemperature hof h1kg hof hmaterial hby h1C.
define havogadro's hconstant h- hanswersthe hnumber hof hatoms hin h12g hof hcarbon h12
h(OR hthe hno. hof hparticles/atoms hin hone hmole hof ha hsubstance)
define hthe hspecific hlatent hheat hof hvaporisation hof hwater h- hanswersthe henergy
hrequired hto hchange hthe hstate hof ha hunit hmass hof hwater hto hgas h(1) hwithout ha
hchange hin htemperature h(1)
features hof han hideal hgas h(3) h- hanswers- hcollisions hare helastic
- hmolecules hhave hnegligible hvolume
- hgas hobeys hideal hgas hlaw h(Boyles hlaw)
assumptions hmade hin hthe hmolecular hkinetic htheory hof han hideal hgas h- hanswers- hall
hmolecules hare hidentical h
- hmolecules hin hrandom hmotion
- hnewtonian hmechanics happly
- hvol hof hgas hmolecules hnegligible h(compared hto hvol hof hgas)
- hcollisions hare helastic
state hand hexplain hwhat hhappens hto hthe hspeed hof hmolecules hin ha hgas hwhen hthe
htemperature hincreases h- hanswersthe haverage/mean hspeed hof hmolecules hincreases
h(1) has hmean hke hproportional hto habsolute htemp
state hwhat his hmeant hby han helastic hcollision h- hanswersa hcollision hin hwhich hke his
hconserved
two hdifferent hgases hat hthe hsame htemp hhave hmolecules hwith hdifferent hmean
hsquare hspeeds. hexplain hhow hthis his hpossible h- hanswersmasses hare hdifferent h(1)
hbut hbecause hke hsame, hmean hsquare hspeeds hmust hbe hdifferent
why hdoes hthe htotal hke hof han hideal hgas hequal hthe htotal hinternal henergy hof han
hideal hgas h- hanswersmolecules hhave hno hpotential henergy h(1) hno helastic hcollisions
hoccur
Explain hwhat his hmeant hby hthe hbinding henergy hof ha hnucleus h- hanswersthe henergy
hrequired hto hsplit hup hthe hnucleus h(1) hinto hindividual hnucleons h(1)
3 hsources hof hbackground hradiation h- hanswersRocks h(1)
