Problem 9.020 a thin-walled container ( 200 mm) with a hot process fluid at [infinity] 55°c is placed in a quiescent, cold water bath at [infinity] 10°c. heat transfer at the inner and outer surfaces of the container may be approximated by free convection from a vertical plate. determine the overall heat transfer coefficient between the hot process fluid and the cold water bath, in w/m2·k. assume the properties of the hot process fluid are those of water. initially assume [infinity] [infinity] and evaluate the properties of the hot process fluid and the cold water bath at the film temperatures for the respective container surfaces. use the churchill and chu correlation for nusselt number on a vertical plate.