Define heat capacity, specific heat capacity and latent heat?

Thespecific latent heatof a substance is the quantity of heat energy required to change the state of a unit mass of a substance.

E_L= mlwhere E_Lis the heat transferred, in joules, m is the mass, in kilograms, andlis the latent heat in joules per kilogram.

The SI unit for specific latent heat is J/kg.

Thespecific latent heat of fusionis the quantity of heat energy released when 1 kg of a substance solidifies (i.e.fuses) without changing its temperature.

Thespecific latent heat of vaporizationis the quantity of heat energy needed to vaporize 1 kg of a substance without changing its temperature.

Heat capacity, orthermal capacity, is themeasurablephysical quantityofheatenergy required to change thetemperatureof an object by a given amount. TheSIunit of heat capacity isjouleperkelvin,and thedimensional formis M1L2T-2T-1.

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Saurabh Singh,

askIITians Faculty

B.Tech.

IIT Kanpur