upper lower Opposing faces on an infinite slab have temperatures T and T corresponding to the upper and lower faces, respectively. Start with an energy balance in order to receive full credit for this problem, and convince yourself that the energy balance leads to a linear temperature profile in the slab T(z) where z is the slab thickness; z=0 at the lower face. Calculate the steady-state temperature profile in the slab, and steady-state heat flux, assuming the thermal conductivity of the slab is k, and the thickness of the slab is 1 slab