Example 3.8.In Example 3.7 we considered a vacuum system with zero leaks. No real vacuum systems aretotally leak-free; engineers work very hard to keep the leakage rate as low as possible. If thetank in Example 3.7 has a leak of 0.0001 lbm/min of air, what will the pressure-time plot looklike, and what will be the final pressure 3.7 is pasted Example 3.7.The microchip diffusion furnace in Fig. 3.4 contains air,which may be considered an ideal gas. The vacuumpump is pumping air out prior to beginning the thermaldiffusion step. During the pumpout process the heatingcoils in the tank hold the temperature in the tankconstant at 68 °F. The volumetric flow rate at the inlet ofthe pump, independent of pressure, is 1.0 ft³/min. Howlong does it take the pressure to fall from 1 atm to0.0001 atm?Volume 10 ft³68°FHeaterVacuumpumpTemperaturecontrollerFigure 3.4 Evacuation of a microchipdiffusion furnace.

Given:Initial pressure Final pressure Flow rate Temperature (convert to Kelvin: Ideal gas constant

Answered: Example 3.8. In Example 3.7 we…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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Example 3.8.
In Example 3.7 we considered a vacuum system with zero leaks. No real vacuum systems are
totally leak-free; engineers work very hard to keep the leakage rate as low as possible. If the
tank in Example 3.7 has a leak of 0.0001 lbm/min of air, what will the pressure-time plot look
like, and what will be the final pressure

3.7 is pasted