The highest thermal diffusivity is of

The highest thermal diffusivity is of

Right Answer is:

Lead

SOLUTION

Thermal diffusivity is the thermal conductivity of the material divided by the product of density and specific heat capacity, at constant pressure.

For iron:

Thermal difference = k/(density × heat capacity) = 46.33/(0.26 × 0.12) = 1484.93

For lead:

Thermal difference = k/(density × heat capacity) = 20.39/(0.41 × 0.032) = 1554.12.

Hence the highest thermal diffusivity from the given option is of Lead.

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