5.41 The tubes in a STHX are 12 ft long. The liquid in the tubes is cyclohexane at an average temperature of 110°F. The flow rate of the cyclohexane entering the heat exchanger is 120,000 lbm/h. The heat exchanger tubes are 1-in. 14 BWG tubes on a 1¼-in. triangular pitch. The shell diameter is 12 in. Determine the pressure drop (psi) through the tube side of the heat exchanger for a 1-pass, 2-pass, and 4-pass tube configuration.