Q.1. Propane gas enters a continuous adiabatic heat exchanger 16 at 40C and 250kPa and exits at 240C. Superheated steam at 300C and 5.0 bar enters the exchanger flowing countercurrently to the propane and exits as a saturated liquid at the same pressure. (a) Taking as a basis 100mol of propane fed to the exchanger, draw and label a process flowchart. Include in your labeling the volume of propane fed (m3), the mass of steam fed (kg), and the volume of steam fed (m3). (b) Calculate values of the labeled specific enthalpies in the following inlet-outlet enthalpy table for this process. References: H2O(1,0.01C),C3H8(g,40C) (c) Use an energy balance to calculate the required mass feed rate of the steam. Then calcular the volumetric feed ratio of the two streams ( m3 steam fed /m3 propane fed). Assume ideal pos behavior for the propane but not the steam and recall that the exchanger is adiabatic. (d) Calculate the heat transferred from the water to the propane (kJ/m3 propane fed). (Hint: Do ax energy balance on either the water or the propane rather than on the entire heat exchanger. (e) Over a period of time, scale builds up on the heat transfer surface, resulting in a lower rate x heat transfer between the propane and the steam. What changes in the outiet streams wouis you expect to see as a result of the decreased heat transfer