Question on heat transfer of a plane wall

AI Thread Summary
The discussion revolves around calculating the rate of heat conduction through a plane wall with specified thickness, surface area, and temperature differences. The thermal conductivity values provided for the wall material at different temperatures (0 oC and 93.3 oC) are crucial for the calculation. Participants clarify that these values indicate the need to estimate thermal conductivity at the average temperature between the two surfaces for accurate results. The main challenge lies in understanding how to apply these thermal conductivity values to the heat conduction formula. Proper estimation of thermal conductivity is essential for solving the problem effectively.
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Homework Statement



A plane wall of 152 mm thickness has surface area of 2.32 m2. One side of the wall is kept at 82.2 oC, and the other side at 4.4 oC. The thermal conductivity of the wall material is 0.036 W/m.K at 0 oC, and that at 93.3 oC is 0.055 W/m.K. Calculate the rate of heat conduction through the wall

Homework Equations



Q= ∆T/R

The Attempt at a Solution



I do understand how to do this but i gt stuck at the part of the question that says "The thermal conductivity of the wall material is 0.036 W/m.K at 0 oC, and that at 93.3 oC is 0.055 W/m.K"

Anyone can just explain to me what does it mean?
 
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That means you should estimate the thermal conductivity at your required temperatures
 

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