Cosmo Learning
Cosmo Learning: Freshman Organic Chemistry Ii
A collection of video lectures from a freshman organic chemistry II course at Yale University. The course is a continuation the first organic chemistry course and covers topic. Lectures cover topics from simple and complex reaction...
Wikimedia
Wikipedia: Activation Energy
This site from the Wikipedia encyclopedia contains a qualitative explanation of activation energy, explaining what it is and why it is necessary. Links are also provided throughout the article for additional information.
Other
On Line Study Guide/reaction Rates and Equilbrium
Here's a full and understandable discussion of Reaction Rates and Equilibrium.
Sophia Learning
Sophia: Reaction Rate
This lesson will describe factors that can affect the rate of a chemical reaction.
BiologyWise
Biology Wise: Chemosynthesis and Photosynthesis
Compares chemosynthesis and photosynthesis, including their chemical reactions, where they take place, their energy sources, the organisms that perform each, the factors that affect their reaction rates, and the byproducts for each.