Problem #02: Consider a large plane wall of thickness L = 0.2 m, thermal conductivity k = 1.2 W/m. °C, and surface area A = 15 m². The two sides of the wall are maintained at constant temperatures of T₁ = 120°C and T₂ = 50°C, respectively, as shown in figure below. Determine the rate of heat conduction through the wall under steady conditions. Plane wall T₁