chap-15-2011W-a

# Equilibrium reaction quotient q value calculated by

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Unformatted text preview: action quotient (Q) = value calculated by using current value concentration in the reaction at any moment. concentration Equilibrium constant (K) = value calculated by using actual value concentration of the reaction at equilibrium. concentration at aA + bB kf kr ([ C ] / c ) c ⋅ ([ D ] / c ) d K= ([ A ] / c ) a ⋅ ([ B ] / c ) b cC + dD (C / c ) c ⋅ ( D / c ) d Q= ( A / c )a ⋅ ( B / c )b Reaction Quotient, Q Reaction Qc < Kc system proceeds from left to right to reach equilibrium high reactant concentration (C / c ) c ⋅ ( D / c ) d Qc = Kc the system is at equilibrium Q = ( A / c )a ⋅ ( B / c )b all concentrations remain constant Qc > Kc system proceeds from right to left to reach equilibrium high product concentration Chemical Equilibrium Chemical Equilibrium : temperature dependent N 2O 4 ( g ) hot c o ld 2 NO2 ( g ) [ NO2 ]12 K1 = [ N2O2 ]1 [ NO2 ]22 K2 = [ N2O2 ]2 2 [ NO2 ]3 K3 = [ N2O2 ]3 K1 ≠ K2 ≠ K3 No reaction occurs to 100% Equilibrium constant (K) Equilibrium Equilibrium : temperature dependent Equilibrium temperature The value of K: indicates “equilibrium position” or reaction end poi...
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