A composite one-dimensional plane wall is of overall thickness 2L. Material A spans the domain –L < x < 0 and experiences an exothermic chemical reaction leading to a uniform volumetric generation rate of q_A. Material B spans the domain 0 ≤ x ≤ L and undergoes an endothermic chemical reaction corresponding to a uniform volumetric generation rate of q_B =– q_A. The surfaces at x =±L are insulated. Sketch the steady-state temperature and heat flux distributions T(x) and q"_x(x), respectively, over the domain–L ≤ x ≤ L for k_A , k_A  = 0.5 k_B, and k_A = 2k_B. Point out the important features of the distributions you have drawn. If q_B = –2q_A , can you sketch the steady-state temperature distribution?