Latent Heat of Fusion Formula - Definition, Equations and ...

The latent heat of fusion is the enthalpy change of any amount of substance when it melts. Formula and solved examples of latent heat of fusion. FormulasPhysicsFormulasLatentHeatOfFusionFormula Previous Next LatentHeatOfFusionFormula Theamountofheatgainedbyasolidobjecttoconvertitintoaliquidwithoutanyfurtherincreaseinthetemperatureisknownaslatentheatoffusion.Thecontentoflatentheatiscomplexinthecaseofseaicebecauseitispossibleforseaiceandbrinetoexisttogetheratanytemperatureandmeltatatemperatureotherthan0oCwhenbathedinaconcentratedsaltsolution,justlikeitoccursinthewallsofbrinecellswhenbrinecellsmigrationoccurs. Ifmkgofsolidconvertstoafluidataconstanttemperaturethatisitsmeltingpoint,theheatconsumedbythesubstanceorthelatentheatoffusionformulaisexpressedas   Q=m×L Wherein L=specificlatentheatoffusionofsubstance. Thetemperatureofthesubstancechangesfromt1(lowtemperature)tot2(hightemperature) the heat which thematerialabsorbs orreleases isexpressedas   Q=mcΔt     Q =mc(t2–t1) Thetotalamountofheatabsorbedor liberatedbythematerialis   Q=mL+mcΔt The latentheat-relatedconceptismarkedbelowinthetable LatentHeatofWater Example1 Apieceofmetalat20oChasamassof60g.Whenitisimmersedinacurrentofsteamat100∘C,0.5gofsteamiscondensedonit.Determinethespecificheatofmetal,giventhatthelatentheatofsteam=540cal/g. Solution: Letcbethespecificheatofthemetal. Heatgainedbythemetal Q=mcΔt Q=60×c×(100–20) Q=60×c×80cal Theheatreleasedbythesteam Q=m×L Q=0.5×540cal Bytheprincipleofmixtures, HeatgivenisequaltoHeattaken 0.5×540=60×c×80 c=0.056cal/g∘C              StaytunedwithBYJU’StolearnmoreaboutPhysics-relatedformulas. FORMULASRelatedLinks ElectricalEnergyFormula DecimalToFractionFormula WaveFormula CentroidOfTrapezoidFormula CofactorFormula ReductionFormula NChooseKFormula PolygonFormula ChemicalEquationForPhotosynthesis SolubilityFormula 1Comment Tsitso June13,2020at10:13pm Whytemperaturesremainconstantduringachangeofstate?? Reply LeaveaCommentCancelreplyYourMobilenumberandEmailidwillnotbepublished.Requiredfieldsaremarked* * SendOTP DidnotreceiveOTP? RequestOTPon VoiceCall * * Website * Grade/Exam Class1 Class2 Class3 Class4 Class5 Class6 Class7 Class8 Class9 Class10 Class11 Class12 IAS CAT BankExam * * PostComment JoinBYJU'SLearningProgram Grade/Exam Class1 Class2 Class3 Class4 Class5 Class6 Class7 Class8 Class9 Class10 Class11 Class12 IAS CAT BankExam GATE Submit × RegisterNow Share Share Share CallUs RegisterwithBYJU'S&DownloadFreePDFs * SendOTP * * * * * Grade Class1 Class2 Class3 Class4 Class5 Class6 Class7 Class8 Class9 Class10 Class11 Class12 IAS CAT BankExam DownloadNow