Answer:74.75 kJ/kg
Step-by-step explanation:
Given
mass of hot fluid
=5 kg/s
Energy associated with it=150 kJ/kg
mass of cold fluid
=15 kg/s
Energy associated with it=50 kJ/kg
Energy lost=5.5 kW
Let the Enthalpy of outlet fluid be h
mass at outlet

Using Energy Conservation


h=74.75 kJ/kg