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150 mol/s of cyclohexane enter a heat exchanger at 25?C and 3 atm and leaves as a vapor at 125?C. The normal boiling point of cyclohexane is 80.7?C; at the normal boiling point, the heat of vaporization is 30.1 kJ/mol. The liquid-phase heat capacity is 156 J/mol K, and the vapor phase heat capacity is 105.3 J/mol K. What is the heat duty of the heat exchanger? You can assume that the heat exchanger operates at constant pressure. The density of liquid cyclohexane is about 780 , and the molecular weight of cyclohexane is 84.2.
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