CHEM 1032 Lecture Notes - Lecture 15: Equilibrium Constant

• School: Temple University
• Department: Chemistry
• Course: CHEM 1032
• Professor: Elizabeth Cerkez

Document Summary

Equilibrium: rate forward = rate backward, concentrations of reactants and products are constant once at equilibrium, quantified with equilibrium constant (k) Concentrations at reestablished equilibrium will be different but k is the same. I can observe a similar thing if i add more reactants at equilibrium: forward rate > backwards rate, q < k. Le ch telier"s principle: when a chemical reaction at equilibrium is disturbed the system shifts in a direction that minimizes the stress, disturbances could be: Volume changes: constant temperature, for gases, i can think of volume changes in 2 ways: Volume decreases, concentration increases: if volume decreases, the reaction shifts to the side with less moles, if volume increases, the reaction shift to the side with more moles. Temperature change: if i change the temperature, i change the value of k, h + endothermic. Heat is the reactant: h - exothermic releasing heat. Heat is the product: heat + a + b c + d.