This preview shows page 1. Sign up to view the full content.
Unformatted text preview: s depends on temperature only. It is independent of the pressure of the equilibrium mixture, and it is not affected by the presence of inert gases. The larger the KP, the more complete the reaction. Very small values of KP indicate that a reaction does not proceed to any appreciable degree. A reaction with KP 1000 is usually assumed to proceed to completion, and a reaction with KP 0.001 is assumed not to occur at all. The mixture pressure affects the equilibrium composition, although it does not affect the equilibrium constant KP. The variation of KP with temperature is expressed in terms of other thermochemical properties through the van't Hoff equation d 1ln KP 2 dT hR 1T2 RuT 2 where hR 1T2 is the enthalpy of reaction at temperature T. For small temperature intervals, it can be integrated to yield ln KP2 KP1 hR 1 a Ru T1 1 b T2 where H is Henry's constant. When a gas is highly soluble in a liquid (such as ammonia in water), the mole fractions of the species of a two-phase mixture in the liquid and gas phases...
View Full Document
This note was uploaded on 06/15/2009 for the course MAE 3311 taught by Professor Hajisheik during the Summer '08 term at UT Arlington.
- Summer '08