Copper is a very good conductor of heat and thus not a very good insulator. It h

Question

Copper is a very good conductor of heat and thus not a very good insulator. It has a thermal conductivity of 398 W/(m- degree C). A square Cu plate with cross-sectional area 0.156 times 10^-2 m^2 is sandwiched between two isothermal plates. The Cu plate is fully insulated along its exposed edges. One side of the Cu plate is maintained at 191.7 degree C by an electric energy supply of 1, 059 watts. How thick, in m, must this Cu plate be so that the temperature on the other side of the Cu plate does not exceed 25.2 degree C? (answer format X.XXX) _______ Order the following materials from lowest expected thermal conductivity (1) to highest expected thermal conductivity (5). Copper porous (70% by volume) polystyrene diamond bulk polystyrene brass

Explanation / Answer

Order of conductivity

DIamond > Copper > Brass > Bulk Polystyrene > Porouspolystyrene

The thermal conductivity of a material depends on its temperature, density and moisture content.

Here diamond is having higher density

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