A heat exchanger is needed to heat a liquid process stream (flow = 10 kg/s, heat capacity = 3.0 kJ/kg°C) from 300°F to 425°F. The heat will be supplied by saturated steam on the shell side of the heat exchanger (available at 600 psig, approx. 490°F, and

a. What flow rate of steam (mass/time) is needed for this heat exchanger?
b. The boiling point of water with which we are most familiar is 100°C. How is it possible to have saturated steam at 490°F?
c. Estimate the required area of the heat exchanger in ƒt².

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Hvap 600 psig 1699 kJ/kg).