7) Superheated steam at 5 psia and 200°F is condensed in a heat exchanger. The steam flows

at 39 lb/s and exits as saturated liquid. Cooling water at 45°F is used to condense the

steam. The water and steam are not mixed in the heat exchanger, but enter and leave as

separate streams. If the maximum allowable rise in the water temperature is 15°F and the

maximum allowable water velocity is 11 ft/s, wat is the diameter of the pipe that feeds

water to the heat exchanger?