Role of Energy in Reactions
In this energy worksheet, students determine the enthalpy of exothermic and endothermic reactions. This worksheet has 1 fill in the blank and 4 short answer questions.
10th - 12th Science 5 Views 19 Downloads
2009 U.S. National Chemistry Olympiad National Exam - Part I
The 2009 version of the first part of a national chemistry competition is posted for your use with olympiad hopefuls. Test takers deal with 60 multiple choice questions covering an entire year of chemistry curriculum. Use this to...
9th - 12th Science
Fracking: Positive or Negative Impact?
Your teenagers may have heard of fracking, but do they really know what it is? And could they debate the benefits and risks? Educate your environmental science class with a lesson about hydraulic fracturing, non-renewable energy sources,...
7th - 12th Science CCSS: Designed
Hess's Law and Reaction Enthalpy Change
Sal introduces students to Hess's Law. The law states that the energy change of a process is independent of how we get from one state to another. He sets up a series of reactions, and solves them to illustrate the principles behind...
16 mins 7th - 10th Science
Gibbs Free Energy and Spontaneity
The series of videos on enthalpy change continues with this look at the Gibbs Free Energy System and Spontaneity. Most students have heard the term, "spontaneous reaction," and Sal explains exactly what a spontaneous reaction is and how...
18 mins 7th - 10th Science
What Triggers a Chemical Reaction?
Chemical reactions are happening all around us every second of every day, but what exactly causes these changes to occur? Using easy-to-understand analogies, this video explains how the concepts of enthalpy and entropy determine the ways...
4 mins 9th - Higher Ed Science CCSS: Adaptable