Question: (a) Would you expect Equation 19.7 to be valid for ceramic and polymeric materials? Why or why not?(b) Estimate the value for the Wiedemann??Franz constant

(a) Would you expect Equation 19.7 to be valid for ceramic and polymeric materials? Why or why not?(b) Estimate the value for the Wiedemann??Franz constant L [in ?-W/(K)2] at room temperature (293 K) for the following nonmetals: silicon (intrinsic), glass-ceramic (Pyroceram), fused silica, polycarbonate, and polytetrafluoroethylene. (19.7)

(19.7)

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