Thermo, Kinetics, Equilibrium

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Test Objectives: Thermodynamics, Kinetics & Equilibrium
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Use Collision Theory to describe how chemical reactions occur
Describe the difference between effective & ineffective collisions
Know the 6 factors that influence reaction rate
Describe how changes in temp, pressure, concentration & surface area affect reaction rate
Describe how the nature of the reactants influences reaction rate
Describe how the presence of a catalyst affects reaction rate
Be able to write thermochemical equations for endothermic and exothermic reactions
Draw, label & interpret potential energy diagrams for both endothermic & exothermic
reactions
o Be able to Label:
 PE of reactants, products & activated complex
 Activation energy of forward & reverse reactions
 Heat of reaction
Be able to indicate the effect of a catalyst on a PE diagram
Be able to calculate the heat of reaction (∆H) given the heat of the products & the heat of
the reactants
Be able to tell from the ∆H if a reaction is endothermic or exothermic
Use table I to determine the stability of the compounds listed
Define enthalpy, entropy, & spontaneity
Know under what conditions a change will always be spontaneous or never be spontaneous
Understand what factors increase or decrease entropy
Given a thermochemical equation for a chemical or physical change be able to predict the
spontaneity by assessing the signs of ∆H & ∆S
Define equilibrium & describe in terms of the forward & reverse reaction rates
Describe what happens to the concentrations of reactants & products in a chemical system at
equilibrium
Understand that equilibrium occurs in a closed system
Be able to list the 3 types of equilibrium & give examples of each
State Le Chatelier’s Principle & apply it to equilibrium systems
Know what a stressor is & how it will affect a chemical system
Be able to explain these terms with respect to a chemical equation : Shift to the Right ,
Shift to the Left
Be able to explain how pressure changes affect gas-phase chemical systems at equilibrium
Be able to explain how temperature changes affect both endothermic & exothermic chemical
systems at equilibrium
Be able to predict how changes in the concentration of a reactant or product will affect the
equilibrium concentrations of a system
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