Flowing juice like 0.5kg / h enters the parallel-flow heat exchanger at 293 K and is heated by 400K water vapor (Cp = 1.76kJ / kgK), which is 2.5 kg / s. The exit temperature of the juice is 360 K, the area where heat transfer takes place Calculate the efficiency and heat transfer of the heat exchanger if it is 20 m2 and the overall heat transfer coefficient is 280W / m2K. (physical properties of fruit juice will be considered the same as water).