Given that the equation for the rate of heat transfer () through a solid by conduction is =kATmeasuredinJs1orW where k is the thermal conductivity of the material (WK1m1) A is the surface area (m2) T is the temperature gradient (Km1) Calculate the heat that will pass through a wall that measures 5m by 4.5m and has a thickness of 0.7m given that the wall is made from refractory material whose thermal conductivity is 1.7Wm1K1. The inside temperature of the wall is 849K(576C) and the outside surface is at 317K(44C). Give your answer to the nearest kW Heat flow =kW