C7- Energy Changes Flashcards
1
Q
What is a Endothermic reaction
A
Take in of energy
2
Q
What is an Exothermic reaction
A
Take out of energy
3
Q
What is Activation energy
A
The energy needed to start a reaction
4
Q
What is a Cell
A
A combination of electrodes and electrolytes that creates a potential difference
5
Q
What is a Battery
A
Two or more cells joined together
6
Q
What are Fuel cells
A
Combine oxygen and hydrogen to form water
7
Q
What are Chemical cells and batteries
A
Electrodes made of metals of different reactivities
