Studied by 3 people
Exothermic reaction profile
High bar, curve, low bar
Endothermic reaction profile
Low bar, curve, high bar
Energy change during reaction =
difference between products and reactants
Activation energy
minimum energy needed to get a reaction started
Activation energy =
reactants to peak of curve
Bond breaking: endo- or exo-?
endothermic
Bond making: endo- or exo-?
exothermic
Bonds in exothermic reactions
making bonds > breaking bonds
Bonds in endothermic reactions
making bonds < breaking bonds
Bond energy
the amount of energy that will break a bond between two atoms
To calculate the energy change for a chemical reaction:
how much energy is needed to break the bonds
how much energy is released when bonds are formed
If the overall energy change is negative, the reaction is...
...exothermic
To find the overall energy change:
add the energy required to break bonds and the energy released by their formation
Note 
Flashcard (34)