Acomposite wall separates combustion gases at 2300◦c from a liquid coolant at 70◦c, with gas and liquid-side convection coefficients of 20 and 800 w/m2 ·k. the wall is composed of a 15 mm-thick layer of beryllium oxide on the gas side, and a 25 mm-thick slab of stainless steel (aisi 304) on the liquid side. the contact resistance between the oxide and the steel is 0.05 m2 ·k/w. what is the rate of heat loss per unit surface area of the composite wall? find all intermediate surface temperatures and sketch the temperature distribution from the gas to the liquid. calculate the overall heat transfer coefficient.