EF 21-1

P3. A 30 Ib/in2 man stream of nitrogen flows through the annular section of a double-tube heat exchanger made of a Cd. 40 2-in. and 1-in. 16 BWG copper tube. The gas flow is 6500 ft3/h, measured at 60F and 760 mm Hg. Water flows into the tube at a velocity of 2 ft/s entering at 50F. Nitrogen is to be cooled from 250 to 60F. The skin heat transfer coefficient in the inner tube is 430 btu/ft2 h F. It is asked to calculate a) The mass velocity of the fluids lb/h, (02 pt) b) The heat exchanged. (01 pt) c) What is the length of the exchanger? (04 pt) The following data is attached

Please explain the equations and procedure thank you.

R=10.73mollbRpsiapie3 Tarle 11. Digensions of StezL Prpz (IPS)