Energy transfer Flashcards
1
Q
∆H meaning
A
Change in energy
2
Q
What is energy measured in?
A
KJ/mol
3
Q
Define an exothermic reaction
A
A reaction that gives out heat energy
4
Q
Define an endothermic reaction
A
A reaction that draws in heat energy
5
Q
Define activation energy
A
The minimum amount of energy needed for a reaction to occur.
6
Q
Catalyst
A
A substance that speeds up a chemical reaction yet doesn’t get used up in the process.
7
Q
If a reaction is exothermic. Does it have a + ∆H or a -∆H?
A
- ∆H
8
Q
If a reaction is endothermic. Does it have a + ∆H or a -∆H?
A
+ ∆H
9
Q
∆H = ?
A
Energy to break bonds + ( - energy to make bonds)
