Review for Final Exam

and Work on Final Project

Today’s Agenda – 1/21/11

• Opener: What is the difference between an endothermic and exothermic reaction?

• Review of Endothermic and Exothermic Reactions (graphs, activation energy, catalysts, energy written in chemical equations)

• Work on Final Project• Closure: Draw a graph of an Exothermic Reaction. Label

the axis and the activation energy. Draw a second graph for the reaction in the presence of a catalayst.

Assignment: Complete the Final Exam Review Packet.

Curriculum• Big Idea: Chemical reactions are predictable. • Concept: Apply the mole concept, or Avogadro’s number, in

stoichiometric calculations, including those involving limiting reactants and percent yield.

• PA Standards:1. 3.2.10.A5: Apply the mole concept to determine number of particles and molar mass for elements and compounds.2. 3.2.10.A4: Standard - 3.2.10.A4: Predict the amounts of products and reactants in a chemical reaction using mole relationships. Explain the difference between endothermic and exothermic reactions.

Curriculum

• Big Idea: Chemical bonding occurs as a result of attractive forces between particles.

• Concept: Chemical bonding can be covalent, polar covalent, or ionic.

PA Standard: 3.2.C.A2 “Explain how atoms combine to form compounds through both ionic and covalent bonding.”

Curriculum

• Big Idea: Changes in matter are accompanied by changes in energy.

• Competency: Demonstrate how changes in matter are accompanied by changes in energy.

• PA Standard 3.2.10.A4: Explain the difference between endothermic and exothermic reactions.

Curriculum

• Big Idea: Chemistry is the study of matter and the changes it undergoes.

• Concept: Mixtures can be separated by physical means because the different components have different properties.

PA Standard 3.2.C.A4: Predict how combinations of substances can result in physical and/or chemical changes.

Curriculum

• Big Idea: Chemical reactions are predictable

• Concept: Common chemical reactions can be categorized as synthesis, decomposition, single replacement, double replacement, or combustion.

PA Standard: 3.2.C.A2 Predict the chemical formulas for simple ionic and molecular compounds.