Chapter 5 - Chemical Energetics
Exothermic reaction
Transfers thermal energy to the surroundings leading to an increase in temperature of the surroundings.
Endothermic reactions
Take in thermal energy from surroundings leading to a decrease in temperature of the surroundings
Enthalpy change definition
The transfer of thermal energy during a reaction. Units: Delta H. H is negative for exothermic, and positive for endothermic
Activation energy
The minimum amount of energy that colliding particles must have to react.
Bond breaking
An endothermic process
Bond making
Exothermic process
Calculate enthalpy change
(Total energy required to break bonds) - (Total energy required to form new bonds)