CHEM 201 - 11.12.07

CHEM 201 - 11.12.07 - CHEM 201 November 12, 2007 Pressures...

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CHEM 201 – November 12, 2007 Pressures o K p = (P A ) 2 /(P B ) o PV = nRT P A V = n A RT P A = (n A /V)RT = [A]RT o K p = (P C ) c (P D ) d /(P A ) a (P B ) b K p = K c (RT) Δn , where Δn = (c + d) – (a + b) and R = 0.08206 Heterogeneous Equilibrium Equations o Pure liquids and pure solids o CaCO 3  CaO + CO 2 o K P = P CO2 = [CO 2 ]RT o Small K C no reaction Large K C complete reaction o Small K P no reaction Large K P complete reaction Predicting Direction o Q C – Reaction Quotient Calculated the same way as K values o If Q < K, reaction goes left to right If Q > K, reaction goes right to left If Q = K, at equilibrium Le Chatlier’s Principle
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