Unit Operations of Chemical Engineering
7th Edition
ISBN: 9780072848236
Author: Warren McCabe, Julian C. Smith, Peter Harriott
Publisher: McGraw-Hill Companies, The
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Chapter 7, Problem 7.12P
(a)
Interpretation Introduction
Interpretation:
The pressure drop needs to be calculated.
Concept Introduction:
Pressure drop in a packed bed depends on the flow velocity, shape of particle and void fraction of the bed. While considering meshes or screens the average particle diameter depends on the screen size. When the flow regime is unknown, full Ergun equation is used as it does not recognizes the transition from laminar to turbulent flow profiles.
(b)
Interpretation Introduction
Interpretation:
The exact values of particle diameter or void fraction are to be determined to obtain the reported value of pressure drop.
Concept Introduction:
Pressure drop in a packed bed depends on the flow velocity, shape of particle and void fraction of the bed. While considering meshes or screens the average particle diameter depends on the screen size. When the flow regime is unknown, full Ergun equation is used as it does not recognizes the transition from laminar to turbulent flow profiles.
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Only focus on H(3), which the answer is minus 1.26 KJ/mol. This also has the ideal gas of nitrogen gas N2. Two enthalpies need to be calculated for this. The first enthalpy is H = (specific volume) times (pressure difference). For the specific volume of nitrogen, how was 12.089 x10^(-5) m^3/mol obtained? I understand the second enthalpy for the heat capacity for nitrogen gas.
chemical engineering.
The answer for H(3) is minus 1.26 KJ/mol. Demonstrate the reference state to the process state for nitrogen gas. I know that is an ideal gas law for the nitrogen gas. I know how to calculate the heat capacity for this.
Chapter 7 Solutions
Unit Operations of Chemical Engineering
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