Kp

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A level Chemistry (Chapter 19 - Equilibrium) Note on Kp, created by Chloe Drewery on 12/09/2017.
Chloe Drewery
Note by Chloe Drewery, updated more than 1 year ago
Chloe Drewery
Created by Chloe Drewery about 7 years ago
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Kp Used for gaseous equilibria Doesn’t use concentration Instead uses partial pressures p(A) Kp =  p(NH3)2 / p(N2) x p(H2)3 for the reaction N2 +3H2(g) à 2NH3(g) P(A) = Mole fraction (A) x total pressure p 1 mole of gas = 24 dm3 Partial pressure is the contribution each gas makes towards the total pressure. Pa = Pascals kPa = Kilopascals atm = Atmospheres Heterogeneous equilibria Contains species in different states Liquids and solids are omitted

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