General Chemistry 6 Equilibrium | Eastern Kentucky University

University:
Eastern Kentucky University
Course:
CHE 111 | General Chemistry
Academic year:

2020
Views:

343

Pages:

1
Author:

Marilyn James

General Chemistry 6: Equilibrium Kinetic (Ea) and Thermodynamic Equilibrium Constant aA + bB⇌cC + dD Equilibrium Constant (Keq): 𝐾"#= Reaction Quotient (Qc): 𝑄1 = Kinetic Products: HIGHER in free energy than thermodynamic products and can form at lower temperatures. “Fast” products because they can form more quickly under such conditions. Thermodynamic Products: LOWER in free energy than kinetic products, more stable. Slower but more spontaneous (more negative DG) [C]( )[D]+ [A]- )[B]/ [C]( )[D]+ [A]- )[B]/ G) Control Exclude pure solids and liquids Reaction Quotient Q < Keq DG < 0, reaction Q = Keq DG = 0, equilibrium Le Châtelier’s Principle If a stress is applied to a system, the system shifts to relieve that applied stress. Example: Bicarbonate Buffer CO2 (g) + H2O (l)⇌H2CO3 (aq)⇌H+ (aq) + HCO3- (aq) Q > Keq DG > 0, reaction ¬ ¯pH Þ &respiration to blow off CO2 &pH Þ ¯respiration, trapping CO2