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Discussion :: Heat and Mass Transfer

  1. Thermal conductivity of air with rise in temperature

    2. A.

     Increases
    B.

     Decreases
    C.

     Remain constant
    D.

     May increase or decrease depending on temperature

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    Answer : Option A

    Explanation :

    As the temperature of air increases the molecular diffusion also gets increases and in case of air,
    Thermal conductivity is directly proportional to the lattice vibration and molecular diffusion and hence as the temperature increases the thermal conductivity of air increases.

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