One hundred thousand pounds per hour of water areto pass through a heat exchanger, which is to raise the water temperature from 140 to 200 F. Combustion products having a specific heat of 0.24 Btu/lb...

One hundred thousand pounds per hour of water areto pass through a heat exchanger, which is to raise the water temperature from 140 to 200F. Combustion products having a specific heat of 0.24 Btu/lb_m
F are available at 8008F. The overall heat-transfer coefficient is 12 Btu/h ft²

F. If 100,000 lb_m/h of the combustion products are available, determine

a. the exit temperature of the flue gas;

b. the required heat-transfer area for a counterflow exchanger.