5.1 Chemical Energetics Flashcards
Define an exothermic reaction
Exothermic reaction transfers thermal energy to the surroundings leading to an increase in the temperature of the surroundings.
In exothermic does the reactant or product have more energy?
Reactants
In endothermic does the reactant or product have more energy?
Products
What is ∆H?
Enthalpy Change
Negative Enthalpy change means the reaction is ___
Exothermic
Positive Enthalpy change means the reaction is ___
Endothermic
Define endothermic reaction
Endothermic reaction takes in thermal energy from the surroundings leading to a decrease in the temperature of the surroundings.
How to Calculate Enthalapy Change?
Add together the bond energies for all the bonds in the reactants.
Add together the bond energies for all bonds in the products.
Define activation energy
The minimum energy that colliding particles must have to react.
