he final step of a manufacturing process in which
Chapter 8, Problem 8.127(choose chapter or problem)
he final step of a manufacturing process in which aprotective coating is applied to the inner surface of a circular tube involves passage of dry, atmosphere airthrough the tube to remove a residual liquid associatedwith the process. Consider a coated 5-m-long tubewith an inner diameter of 50 mm. The tube is main-tained at a temperature of 300 K, and the residual liquidexists as a thin film whose corresponding vapor pres-sure is 15 mm Hg. The molecular weight and diffusioncoefficient of the vapor are ?A?70 kg/kmol andDAB?10?5m2/s, respectively. Air enters the tube at amean velocity of 0.5 m/s and a temperature of 300 K.(a) Estimate the partial pressure and mass density ofvapor in the air exiting the tube.(b) What is the rate of liquid removal from the tube inkg/s?
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