As shown in Fig. P2.44, the 6-in-thick exterior wall of a building has an average thermal conductivity of 0.32Btu/h ∙ ft ∙ oR. At steady state, the temperature of the wall decreases linearly from T1 = 70oF on the inner surface to T2 on the outer surface. The outside ambient air temperature it T0 = 25oF and the convective heat transfer coefficient is 5.1Btu/h ∙ft2 ∙oR. Determine
(a) The temperature T2, in oF, and
(b) The rate of heat transfer through the wall, in Btu/h per ft2 of surface area.

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Wall *= 0.32 Bruh ft R T = 25°F h = 5.1 Btu/h - fr.°R T, = 70 F- 6 in.