Difference Between Heat and Energy:
Your packet has a quick reading about this topic on page 1. The embeded pHet is also a resource to help you see the difference between heat and energy also.
Energy Forms and Changes pHet
Bond Energy and Enthalpy:
Observe the energy changes involved when atoms form bonds and break bonds in this SIMULATION. Can you develop an equation to determine the enthalpy using bond energies? Put your thinking on page 6 of your packet.
The linked resource below is a description of what occurs with Bond Energies in an exothermic reaction
Simulation: H2 + Cl2 --> 2 HCl Bond Energy
2nd Way to Determine Enthalpy... Calorimetry:
Below are a few resources to help you better understand the concepts of specific heat and the technique called calorimetry.
Calorimetry Technique
Specifice Heat
3rd Way to Determine Delta H: Hess's Law
Hess's Law is another way to determine a reaction's Enthalpy when the reaction is too difficult to measure using calorimetry (i.e.: heats up too much for the calorimeter to exist or take too long to measure accurately). The embedded video below will help you see the strategy Hess's Law developed and how to put it into application.
Hess's Law
4th Way to Determine Delta H: Heats of Formation:
The embedded video below gives a quick synopsis of how to calculate the enthalpy of a reaction using compounds' heats of formation values.
Heats of Formation
Big Chemical Reactions Review (Talking About MID-TERM REVIEW!!!):
Use the linked resources to help you prepare for the midterm focused on units 2, 3 and 4.
Review Guide: Big Chemical Reaction Review (KEY)