Other
University of Siegen: Enthalpy of Solution
This resource provides a physical reaction. Hydrous and anhydrous calcium chloride react with water to produce physical exothermic and endothermic reactions.
Other
Austin Community College: Handout on Enthalpy
A step-by-step example of how to complete Hess's Law problems. This example includes all the manipulations that may be required for Hess's Law.
University of Minnesota
University of Minnesota Outreach: Endothermic and Exothermic Reactions
A nice juxtaposition of endo- and exothermic reactions. Outlines two demonstrations. Barium hydroxide, sodium acetate, ammonium nitrate, ammonia.
Sophia Learning
Sophia: Endothermic/exothermic Reactions: Lesson 4
This lesson explains the difference between endothermic and exothermic chemical reactions. It is 4 of 4 in the series titled "Endothermic/Exothermic Reactions."
Sophia Learning
Sophia: Endothermic/exothermic Reactions: Lesson 1
This lesson explains the difference between endothermic and exothermic chemical reactions. It is 1 of 4 in the series titled "Endothermic/Exothermic Reactions."
Sophia Learning
Sophia: Endothermic/exothermic Reactions: Lesson 2
This lesson explains the difference between endothermic and exothermic chemical reactions. It is 2 of 4 in the series titled "Endothermic/Exothermic Reactions."
CK-12 Foundation
Ck 12: Biology: Energy and Biochemical Reactions
[Free Registration/Login may be required to access all resource tools.] Covers the role of energy in chemical reactions.
CK-12 Foundation
Ck 12: Physical Science: Endothermic Reactions
[Free Registration/Login may be required to access all resource tools.] Definition of an endothermic reaction, the role of energy, and examples of endothermic reactions.
CK-12 Foundation
Ck 12: Physical Science: Activation Energy
[Free Registration/Login may be required to access all resource tools.] Definition of activation energy and why all chemical reactions require it.
BBC
Bbc: Gcse Bitesize: Heat Energy Changes in Chemical Reactions
This lesson focuses on heat energy changes in chemical reactions. Exothermic reactions transfer energy to the surroundings. Endothermic reactions take in energy from the surroundings. It also offers links to a video and a test.
BBC
Bbc: Gcse Bitesize: Exothermic and Endothermic Reactions Aqa
This lesson focuses on Exothermic and Endothermic Reactions. Exothermic reactions transfer energy to the surroundings. Endothermic reactions take in energy from the surroundings. It provides links to a video and a test.
CK-12 Foundation
Ck 12: Physical Science: Conservation of Energy in Chemical Reactions
[Free Registration/Login may be required to access all resource tools.] Describes the law of conservation of energy and how energy is conserved in chemical reactions.
CK-12 Foundation
Ck 12: Physical Science: Conservation of Energy in Chemical Reactions
[Free Registration/Login may be required to access all resource tools.] Covers the law of conservation of energy and how energy is conserved in chemical reactions.
Khan Academy
Khan Academy: Test Prep: Mcat: Chemical Processes: Thermochemistry: Endothermic vs. Exothermic Reactions
Using an illustrated example, the difference between an endothermic and an exothermic reaction is described. The concept of enthalpy, or heat energy change, is explained, and the energy diagrams of reactions are presented.
Other
University of Liverpool: Reactions in Everyday Life: Endothermic and Exothermic
Equations illustrating both endothermic and exothermic reactions, with energetics involved.
Other
On Line Study Guide/reaction Rates and Equilbrium
Here's a full and understandable discussion of Reaction Rates and Equilibrium.
Sophia Learning
Sophia: Endothermic/exothermic Reactions: Lesson 3
This lesson explains the difference between endothermic and exothermic chemical reactions. It is 3 of 4 in the series titled "Endothermic/Exothermic Reactions."