cm Thermal conductivity: 0.53 W/cm C 8. You have been assigned to design a heat exchanger to cool ou a gaseous process stream in a chemical plant. The stream (20 kg/s) enters at 431 K, has a heat capacity of 3.45 J/g C, and needs to be cooled to 402 K. Cooling water is available at 85°F and has a specified maximum temperature of 120 F. The over- all heat-transfer coefficient is approximately 570 W/m² K. How much area must the heat exchanger have? 6 cm

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