2-140 Heat is transferred steadily through a 0.2-m thick 8 m x 4 m wall at a rate of 1.6 kW. The inner and outer surface temperatures of the wall are measured to be 15°C to 5°C. The average thermal conductivity of the wall is a) 0.001 W/m · °C b) 0.5 W/m · °C c) 1.0 W/m · °C d) 2.0 W/m · °C e) 5.0 W/m · °C | |
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