Energy of Chemical Reactions Flashcards
1
Q
breaking bonds…
A
requires energy
2
Q
Making bonds….
A
releases energy
3
Q
change of enthalpy
A
heat of a reaction Kcal/mol or J/mol
4
Q
Exothermic reaction
A
excess energy is released, energy is written as a product, the energy of the reaction is decreased (-Qrxn)
5
Q
Endothermic reaction
A
Energy is absorbed, energy is written as a reactant, energy is increased (+Qrxn)
6
Q
activation energy…
A
the energy needed for a rxn to occur
