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Module 4: Reactions and Reactivity

Overview

Activities in this module allow students to explore chemical reactions. They can change disassociation and activation energies and explore their impacts on equilibrium, energy release, and reaction pathways. Models of catalysis.

Activities

• Activation Energy [advanced]
  
  
• Catalysis: Homogeneous
  
  
• Chemical Equilibrium (demo)
  
  
• Chemical Equilibrium and Le Chatelier's Principle
  
  
• Chemical Potential Energy and Phase Change
  
  
• Chemical Reaction Kinetics: Dissociation and Recombination of Diatomic Molecules (Demo)
  
  
• Chemical Reactions (advanced unit)
  
  
• Chemical Reactions and Stoichiometry (SAM)
  
  
• Chemical Reactions: 2A to 2A
  
  
• Chemical Reactions: A2 + B
  
  
• Chemical Reactions: A2 plus B2
  
  
• Counting Reactants and Products
  
  
• Explosion
  
  
• Free Radicals: Their Role in Chemical Reactions
  
  
• Polymerization: Step Growth (model only)
  
  
• Potential Energy in Covalent Bond Formation
  
  
• Reaction Rate and Concentration
  
  
• Reaction Rate and Temperature
  
  
• Reaction Rates, Catalysis, and Pasteurization
  
  
• Reversibility of Chemical Reactions
  
  

Objectives and Goals

Students will be able to:

• demonstrate an understanding of reaction rate of chemical reactions by varying concentration, container size and temperature.

• identify when a model of chemical solution is in equilibrium.

• effect reactions by providing a catalyst and describing its role.

• note what happens in the transformation of activation energy to potential energy and visa versa.

• describe what happens when heat is added to a system in equilibrium, including what happens to the bonded molecules.

• manipulate the relationship between phase change and kinetic/potential energies by heating and cooling helium, and observing the trade off of energies.

•describe/draw in pictoral series a model of an explosion.