6. Steam is to be condensed on the shell side of a 1-shell-pass and 8-tube-passes condenser, with 50 tubes in each pass at 90F (hfg = 1043 Btu/lbm). Cooling water (Cp = 1.0 Btu/lbm . F) enters the tubes at 60F and leaves at 73F. The tubes are thin- walled and have a diameter of 3/4 in. and length of 5 ft per pass. If the overall heat transfer coefficient is 600 Btu/h ft. F, determine (a) the rate of heat transfer, (b) the rate of condensation of steam, and (c) the mass flow rate of cold water. Steam 90F 20 lbm/s 73F 60F Water 90F