Answered: A rigid, well-insulated tank contains…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A rigid, well-insulated tank contains air. A partition in the tank separates 12 ft^3 of air at 14.7 lbf/in2, 40◦F (left side of the tank) from 10 ft^3 of air at 50 lbf/in2, 200◦F(right side of the tank), as illustrated in the figure. The partition is removed and air from the two sides mix until a final equilibrium state is attained. The air can be modeled as an ideal gas, and kinetic and potential energy effects can be neglected. (Note: values for the left side of the tank are denoted with a subscript L, and values for the right side of the tank are denoted with a subscript R).

a) Determine the final temperature (in F)

b) Determine the final pressure (in lbf/in^2)

c) Calculate the amount of entropy produced, in Btu/R

d) Is this mixing process reversible or irreversible?

air
air
air
P2, T2
V½ = 12 ft
PL = 14.7 lbf/in.?
TL= 40°F = 500°R
VR = 10 ft
PR = 50 lbf/in.?
TR- 200°F = 660°R
%3D
%3D

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