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Preheating Air by Steam for Use in a Dryer. An air stream at 32.2 celsius is...

Preheating Air by Steam for Use in a Dryer. An air stream at 32.2 celsius is to be used in a dryer and is first preheated in a steam heater, where it is heated to 65.5 celsius. The air flow is 1000 kg mol/h. The steam enters the heater saturated at 148.9 celsius, is condensed and cooled, and leaves as a liquid at 137.8 celsius. Calculate the amount of steam used in kg/h.

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