Lesson 2 : Bond energies Flashcards
1
Q
Is breaking bonds endothermic or exothermic?
A
- Endothermic process.
- Energy must be supplied to break bonds in the reactants.
2
Q
Is making bonds endothermic or exothermic?
A
- Exothermic process.
- Energy is released when bonds in the products are formed.
3
Q
What do bond energies calculate?
A
The energy needed to break bonds and the energy released when bonds are formed.
4
Q
What is the overall energy change of a reaction?
A
The difference between the energy needed to break bonds in the reactants and the energy released when bonds in the products are formed.
5
Q
What is the difference between the energy in exo vs endo reaction?
A
In an exothermic reaction, the energy released from forming new bonds is greater than the energy needed to break existing bonds.
In an endothermic reaction, the energy needed to break existing bonds is greater than the energy released from forming new bonds.
