Chemistry- Chp 18 - Reaction Rates and Equilibrium - Study Guide

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  • 1. Name _______________________________________ Date ______________________ Chapter 18 Review Sheet• What is the collision theory?• How does temperature affect reaction rate?• How does surface area affect reaction rate?• How does concentration affect reactants?• How does the presence of a catalyst affect the reaction rate?• How do catalysts affect the activation energy?• Know how to interpret reaction rate graphs with and without catalysts
  • 2. • What is equilibrium? How does the rates of the forward reaction compare to the rates of the reverse reaction?• What is LeChatlier’s principle?• What kind of shifts in equilibrium are expected with changes in:  Concentration  Temperature  Pressure• Know that the amount of energy released or absorbed during a chemical reaction is the heat of reaction  Heat of reaction = PE of products – PE of reactants• What is an endothermic reaction? Is their heat of reaction + or -?• What is an exothermic reaction? Is their heat of reaction + or -?• How do you calculate the Keq (equilibrium constant) for an equation Ex.) aA + bB  cC dD• How does Keq determine whether the products or reactants are favored at equilibrium?• What is entropy? What is the entropy trend for systems?• What is enthalpy? What is the enthalpy trend for systems?• Spontaneous vs. non spontaneous reactions