The inner and outer surfaces of a 5-m = 6-m brick wall of thickness 30 cm are maintained at temperatures of 20°C and 5°C, respectively, and the rate of heat transfer through the wall is 900 W. Determine the rate of exergy destruction associated with this process. Take T0 = 0°C.

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Brick wall 20°C 5°C 30 cm FIGURE P8-95