A heat exchanger is to cool ethylene glycol (cp =2.56 kJ/kg·°C) flowing at a rate of 3.2 kg/s from 80°C to 40°C by water (cp =4.18 kJ/kg·°C) that enters at 20°C and leaves at 70°C. Determine (a) the rate of heat transfer and (b) the mass flow rate of water.
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