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
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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