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Thermo 7e SM Chap16 1

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Thermo 7e SM Chap16 1
16-1

Solutions Manual for

Thermodynamics: An Engineering Approach
Seventh Edition
Yunus A. Cengel, Michael A. Boles
McGraw-Hill, 2011

Chapter 16
CHEMICAL AND PHASE EQUILIBRIUM

PROPRIETARY AND CONFIDENTIAL
This Manual is the proprietary property of The McGraw-Hill Companies, Inc. (“McGraw-Hill”) and protected by copyright and other state and federal laws. By opening and using this Manual the user agrees to the following restrictions, and if the recipient does not agree to these restrictions, the Manual should be promptly returned unopened to McGraw-Hill: This Manual is being provided only to authorized professors and instructors for use in preparing for the classes using the affiliated textbook. No other use or distribution of this Manual is permitted. This Manual may not be sold and may not be distributed to or used by any student or other third party. No part of this
Manual may be reproduced, displayed or distributed in any form or by any means, electronic or otherwise, without the prior written permission of McGraw-Hill.

PROPRIETARY MATERIAL. © 2011 The McGraw-Hill Companies, Inc. Limited distribution permitted only to teachers and educators for course preparation. If you are a student using this Manual, you are using it without permission.

16-2
Kp and Equilibrium Composition of Ideal Gases
16-1C No, the wooden table is NOT in chemical equilibrium with the air. With proper catalyst, it will reach with the oxygen in the air and burn.

16-2C They are
PC C PDν D v Kp =

PAν A PBvB

, K p = e − ∆G*(T ) / RuT

ν

and

Kp =

N CC N νDD ⎛ P


N νAA N νBB ⎝ N total






∆ν

where ∆ν = ν C + ν D −ν A −ν B . The first relation is useful in partial pressure calculations, the second in determining the Kp from gibbs functions, and the last one in equilibrium composition calculations.

16-3C (a) No, because Kp depends on temperature only.
(b) In general, the total mixture pressure affects the mixture composition. The equilibrium constant for the reaction
N 2 + O

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