3. A juice at a rate of 500 kg/h is heated from 60 °C to 115 °C. The juice has a specific heat of 3.85 kJ/(kg K). Steam at an absolute pressure of 202.7 kPa is used as the heating medium. Steam condenses and leaves the heat exchanger at 115 °C. Determine the mass flow rate of steam necessary to heat the juice.

Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.

The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.