Thermochemical Equations and Using the energy term (heat of reaction) in mole-mass problem solving 

This video goes through A) four examples of thermochemical reactions to demonstrate 1) placement of the energy term within the equation as well as external to the equation for heats of reaction for exothermic reactions and then for endothermic reactions, 2) showing the importance of states for magnitude of the delta H (heat of reaction), and 3) showing changing delta H signs for reversible reactions, (all of this goes to 4:05), and then B) going through several delta H--mole--mass conversions (starting at 4:05 to end): problem solving using the energy term (the heat of reaction) converting to moles and/or mass