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Unformatted text preview: PO2 PSO2 PO2 RT Kc = KP(RT) In general terms: RT KP = Kc(RT)-1 KP = Kc(RT)Δn Equilibrium constant expressions do not contain concentration terms for solid or liquid phases of a single component (that is, pure solids or liquids).
C(s) + H2O(g) CO(g) + H2(g) PCOPH2 [CO][H2] (RT)1 = 2 [H2O] PH2O2 Kc = 6 Disturbing Reaction Mixtures at Equilibrium Disturbing Reaction Mixtures at Equilibrium The condition of chemical equilibrium may be “disturbed” such that Q≠K
Changing concentrations at a given temperature, which results in a change in Q Changing temperature, which results in a change in K Effect of Changing Concentrations
Adding or removing reactants or products Adding or removing reactants or products
EXAMPLE: Add butane to a reaction mixture with butane and isobutane in equilibrium at 25 °C. The equilibrium constant at 25 °C is 2.5. Butane ⇌ Isobutane isobutane 1.25 x K 2.5 Q butane 2.00 x Initial (mol L‐1) 0.500 1.25
Concentration immediately on immediately on adding butane (mol L‐1) Change in concentration to reestablish equilibrium (mol L‐1) Equilibrium (mol...
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- Spring '11