A heat exchanger is a piece of equipment that allows heat to be transformed from one stream to another while preventing the streams from mixing. Here, a heat exchanger has one stream containing an ice slurry entering at 0*C that exits as water (H2O) at 20*C. The second stream enters at 8.8 kg/min as hot ammonia (NH3) vapor at 12.2 atm and 144*C. The ammonia stream leaves the exchanger as a vapor at 12.2 atm and 34*C. Two heat capacities of ammonia are provided as: Cp (NH3 vapor, P=12.2 atm) = 8.0J/mol-K and Cp (NH3 liquid, P=12.2 atm) = 82.3 J/mol-K.A. Draw the enthalpy path for each componentB. Find the mass flow rate (kg/s) of the waterC. What percentage of the enthalpy change of the water is due to the phase change?D. The water enters as liquid water at 0*C instead of an ice slurry. Will the enthalpy change of the water stream increase, decrease, or stay the same? Exercise 6.4.2: Ice ammonia heat exchanger.i AboutA heat exchanger is a piece of equipment that allows heat to be transferred from one stream to another while preventing the streamsfrom mixing. Here, a heat exchanger has one stream containing an ice slurry entering at 0°C that exits as water (H20) at 20°C. Thesecond stream enters at 8.8 kg/min as hot ammonia (NH3) vapor at 12.2 atm and 144°C. The ammonia stream leaves the exchangeras a vapor at 12.2 atm and 34°C. Two heat capacities of ammonia are provided as: C, (NH3, vapor, P=12.2 atm) = 8.0 J/mol-K and C,(NH3, liquid, P=12.2 atm) = 82.3 J/mol-K.(a) Draw the enthalpy path for each component.(b) Find the mass flow rate (kg/s) of the water.(c) What percentage of the enthalpy change of the water is due to the phase change?(d) The water enters as liquid water at 0°C instead of an ice slurry. Will the enthalpy change of the water stream increase, decrease, orstay the same?Feedback?

Given: Cp (NH3 vapor, P=12.2 atm) = 8.0J/mol-K and Cp (NH3 liquid, P=12.2 atm) = 82.3 J/mol-K a) Using Perry's handbook: Enthalpy of ammonia at 144 °C, 12.2 atm (1.236 MPa) H144°C=32.833 kJ/mol Enthalpy of ammonia at 34°C, 12.2 atm (1.236 MPa) H34°C=26.997 kJ/mol Enthalpy of Ice slurry at 0°C HIce=-6 kJ/mol Enthalpy of water at 20°C Hwater=1.5003 kJ/mol b) Mass flow rate of water: m×Cp×∆TAmmonia=m×Cp×∆TWater8.8kgmin×8.0kJkmol K×417-307K=m×4.187kJkmol K×293-273m=92.48kgmin=1.54 kgs Answer: Mass flow rate of water is 1.54 kg/sc) Percentage of enthalpy change of water due to phase change: % Change: =-6-1.5003-6×100=125 % Answer: Enthalpy change due to phase change is 125%d) Instead of ice slurry if liquid water is used: Enthalpy of water at 0°C : H0°C=1.1×10-5 kJ/mol % Change in enthalpy: =1.1×10-5-1.50031.1×10-5×100=-1.364×10-3 Answer: If liquid water is used instead of ice slurry enthalpy change will decrease.