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Discussion :: Heat and Mass Transfer

  1. Thermal diffusivity of a substance is given by (where h = Thermal diffusivity, ρ = Density of substance, S = Specific heat, and k = Thermal conductivity)

    2. A.

     h = k/ ρS
    B.

     h = ρS/k
    C.

     h = S/ρk
    D.

     h = kρ/S

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    Answer : Option A

    Explanation :

    Thermal Diffusivity is defined as the ratio of heat conducted to the heat energy stored per unit volume of a material.
    the thermal conductivity of a substance divided by the product of its density and its specific heat capacity.
    Thermal diffusivity of a substance is given by
    h = k/ ρS (where h = Thermal diffusivity, ρ = Density of substance, S = Specific heat, and k = Thermal conductivity)

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