Question

what happens to the thermal conductivity of a wall if its thickness is doubled ?​

Answer 1

The thermal conductivity is doubled if the thickness of wall is doubled because the larger the area of a solid the larger will be the number of molecules and electrons on each layer so the greater will be rate of flow of heat through solid.

Answer 2

Explanation:

The thermal conductivity is doubled if the thickness of wall is doubled because the larger the area of a solid the larger will be the number of molecules and electrons on each layer so the greater will be rate of flow of heat through solid