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Discussion :: Heat and Mass Transfer

  1. Thermal diffusivity of a substance is

  2. A.

     Directly proportional to the thermal conductivity

    B.

     Inversely proportional to density of substance

    C.

     Inversely proportional to specific heat

    D.

     All of the above

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    Answer : Option D

    Explanation :

    The thermal diffusivity of a substance or material is the thermal conductivity divided by the density and specific heat capacity at constant pressure and is a measure the rate of transfer of heat of a substance or material from the hot side to the cold side.


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