Problem 1: (20 points) A shell-and-tube condenser with horizontal 7/8-in BWG 16 copper tubes is used to condense benzene vapor. The vapor is condensed at atmospheric pressure, it's enthalpy of vaporization is around 394 KJ/kg, and the thermal conductivity at the reference temperature is around 0.150 W/m.C. Assume the cooling water average temperature to be 40C and neglect the tube and water film resistances. a) Calculate the reference temperature T and evaluate the liquid properties at this temperature. You may use the textbook and/or Perry's Chemical Engineers' Handbook. b) Estimate the film coefficient for the top row of tubes (W/m2.C). c) Estimate the average coefficient for a stack of 10 tubes (W/m2.C)