Energy Changes Flashcards
1
Q
What are two example of exothermic reactions?
A
- Combustion
- Neutralization
2
Q
What are two example of endothermic reactions?
A
- Thermal decomposition
- Photosynthesis
3
Q
How do you calculate energy change for a reaction?
A
Energy change = reactants energy - products energy
4
Q
Is making bonds exothermic or endothermic?
A
Exothermic
Making bonds releases energy.
5
Q
Is breaking bonds exothermic or endothermic?
A
Endothermic
Breaking bonds uses energy.
6
Q
Are melting and evaporating endothermic or exothermic?
A
Endothermic.
7
Q
Are condensing and freezing exothermic or endothermic?
A
Exothermic.
8
Q
What is activation energy?
A
The minimum energy needed for a reaction.
