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Air at 18°C (Cp =1006 J/kg °C) is to be heated.to 58 °C by hot oil at 80°C (Cp = 2150 J/kg °C)in a cross-flow heat exchanger with air mixed and oil unmixed. The product of heat transfer surface area and the overall heat transfer coefficient is 750 W/m2. °C and the mass flow rate of air is twice that of oil. Determine: a. The effectiveness of the heat exchanger, b. The mass flow rate of air, and c. The rate of heat transfer

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