Answered: A). Determine the critical length of…

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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A). Determine the critical length of duct L_max where the flow becomes choked. Express your answer to three significant figures and include the appropriate units.

B). Determine the Mach number at section 2. Express your answer using three significant figures.

C). Determine the temperature at section 2. Express your answer using three significant figures. Use K as the unit for temperature.

D). Determine the pressure at section 2. Express your answer to three significant figures and include the appropriate units.

Please use US Customary units for A and D. Thank you!

Air in a large room has a temperature of 24° C and
absolute pressure of 101 kPa. It is drawn into the
200-mm-diameter duct isentropically such that the
absolute pressure at section 1 is 90 kPa. Duct has the
average friction factor of f = 0.002. Suppose that
L = 160 m. Gas constant for air is
R = 286.9 J/[kg · K] and its specific heat ratio is
k = 1.40. (Figure 1)
200 mm
2
L
Lmax

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