Thermodynamics Final
Exam multiple choice
Questions and Answers
Updated 2026
IfBtheBidealBgasBlawBisBapplicable,BweBknowBenthalpyBandBinternalBenergyBareBaBfun
ctionBofBwhichBthermodynamicBproperty?B-BAnswerBtemperature
AnBopenBsystemBallows__________toBcrossBtheBboundary,BwhileBaBclosedBsystemBallo
ws_________toBcrossBtheBboundary.B-BAnswerBmassB&Benergy;Benergy
WhatBisBtheBthermalBefficiencyBaBheatBengineBwithBtheBfollowingBvalues:BQin=100BBt
u,BQout=60BBtu?B-BAnswerBn=Wcycle/QinBWcycle=Qin-Qout
40%
IfBtheBtemperaturesBofBtwoBobjectsBareBequal,BtheirBinternalBenergiesBmayBnotBbeBe
qual.B-BAnswerBTrue
WhatBisBaBthermodynamicBprocess?B-
BAnswerBHowBaBsubstanceBchangesBfromBoneBstateBtoBanother.
WhatBisBaBthermodynamicBstate?B-BAnswerBTheBstateBthatBaBsubstanceBisBin.
i.e.Bsolid,Bliquid,Bgas
SpecificBheatsBrelateBtemperatureBtoBwhatBtwoBtypesBofBenergy?B-
BAnswerBinternalBenergyB&Benthalpy
, TemperatureBisBdependentBonBmaterialBtype.B-BAnswerBFalse
ReferringBtoBtheBsignBconventionsBofBtheB1stBlawBofBthermodynamicsBforBaBcontrolBb
oundary,BwhichBofBtheseBareBpositiveBquantities?B-BAnswerBworkBoutB&BheatBin
NameBtheB4BprincipalBtemperatureBscalesBused:B-
BAnswerBFahrenheit,BRankine,BCelsius,BKelvin
ABcontrolBvolumeBisBaBsystemBthat.....B-
BAnswerBallowsBtheBtransferBofBmatterBacrossBitsBboundary
ABsystemBisBsaidBtoBbeBat___________ifBnoneBofBitsBpropertiesBchangesBwithBtime.B-
BAnswerBsteady-state
ABclosedBsystemBalwaysBcontainsBtheBsameBmatter;BthereBisBnoBtransferBofBmatterBa
crossBitsBboundary.B-BAnswerBTrue
TheBcompositionBofBaBclosedBsystemBcannotBchange,B-BAnswerBFalse
TheBspecificBvolumeBisBtheBreciprocalBofBdensity.B-BAnswerBTrue
ListBtheB3BmodesBofBenergyBtransferBbyBheatBandBaBshortBstatementBforBeachBregar
dingBtheBdifferencesBamongBthem.B-BAnswerBradiation-
emitted;Bdoesn'tBneedBaBmedium
convection-usuallyBrequiresBaBfluid
conduction-needsBaBmedium;BintimateBcontact
Exam multiple choice
Questions and Answers
Updated 2026
IfBtheBidealBgasBlawBisBapplicable,BweBknowBenthalpyBandBinternalBenergyBareBaBfun
ctionBofBwhichBthermodynamicBproperty?B-BAnswerBtemperature
AnBopenBsystemBallows__________toBcrossBtheBboundary,BwhileBaBclosedBsystemBallo
ws_________toBcrossBtheBboundary.B-BAnswerBmassB&Benergy;Benergy
WhatBisBtheBthermalBefficiencyBaBheatBengineBwithBtheBfollowingBvalues:BQin=100BBt
u,BQout=60BBtu?B-BAnswerBn=Wcycle/QinBWcycle=Qin-Qout
40%
IfBtheBtemperaturesBofBtwoBobjectsBareBequal,BtheirBinternalBenergiesBmayBnotBbeBe
qual.B-BAnswerBTrue
WhatBisBaBthermodynamicBprocess?B-
BAnswerBHowBaBsubstanceBchangesBfromBoneBstateBtoBanother.
WhatBisBaBthermodynamicBstate?B-BAnswerBTheBstateBthatBaBsubstanceBisBin.
i.e.Bsolid,Bliquid,Bgas
SpecificBheatsBrelateBtemperatureBtoBwhatBtwoBtypesBofBenergy?B-
BAnswerBinternalBenergyB&Benthalpy
, TemperatureBisBdependentBonBmaterialBtype.B-BAnswerBFalse
ReferringBtoBtheBsignBconventionsBofBtheB1stBlawBofBthermodynamicsBforBaBcontrolBb
oundary,BwhichBofBtheseBareBpositiveBquantities?B-BAnswerBworkBoutB&BheatBin
NameBtheB4BprincipalBtemperatureBscalesBused:B-
BAnswerBFahrenheit,BRankine,BCelsius,BKelvin
ABcontrolBvolumeBisBaBsystemBthat.....B-
BAnswerBallowsBtheBtransferBofBmatterBacrossBitsBboundary
ABsystemBisBsaidBtoBbeBat___________ifBnoneBofBitsBpropertiesBchangesBwithBtime.B-
BAnswerBsteady-state
ABclosedBsystemBalwaysBcontainsBtheBsameBmatter;BthereBisBnoBtransferBofBmatterBa
crossBitsBboundary.B-BAnswerBTrue
TheBcompositionBofBaBclosedBsystemBcannotBchange,B-BAnswerBFalse
TheBspecificBvolumeBisBtheBreciprocalBofBdensity.B-BAnswerBTrue
ListBtheB3BmodesBofBenergyBtransferBbyBheatBandBaBshortBstatementBforBeachBregar
dingBtheBdifferencesBamongBthem.B-BAnswerBradiation-
emitted;Bdoesn'tBneedBaBmedium
convection-usuallyBrequiresBaBfluid
conduction-needsBaBmedium;BintimateBcontact