Acetone vapor at 150°C and 1 atm absolute pressure enters the shell side of a vertical counter-current shell and tube heat exchanger with onetube pass and one-shell pass at the rate of 0.1 kg/s and leaves as a saturated liquid at essentially the same pressure. Cooling is provided by cooling water with a maximum exit temperature of 50°C. Determine:

(a) The recommended direction of flow of acetone and cooling water in the heat exchanger (up or down).

(b) The flow rate and inlet temperature of the cooling water if it is desired to have a = 10°C.

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