Heat



Qe: Heat emitted, Qr: Heat received, m: object’s total mass(kg), c: specific heat(J/kg.K), Δt: change in temperature(K)




The specific heats of some material


SubstanceSpecific Heat
(J/kg.K)
Water4200
Ice Water2100
Aluminium880
Iron460
Copper380
Lead130

Fusion(Freezing Or Solidification)



Q: quantity of heat(J), λ: heat of fusion(j/kg), m: mass(kg)



Heat Of Fusion Some Materials


SubstanceLatent Heat Of Melting
(J/kg)
Lead25
Tin60
Gold67
Mercury11
silver88
Iron209
Ice Water334
Aluminium321

Vaporization



L: heat of vaporization



Heat Of Vaporization Of Some Materials


SubstanceHeat Of Vaporization
(J/kg)
Water2,26.106
Iron5,80.104
Mercury2,85.105
Wine8,57.105

Linear Expansion



Io: original length (m), α: coefficient of linear expansion(K), Δt: change in temperature




Volume Expansion






Area Expansion





Change Of Density(Volumetric Mass Density)



Do: original density (kg/m3)




Change Of Diameter Of The Cross Section Of A Solid