C5—Energy Changes Flashcards
1
Q
Every chemical change involves….
A
Energy changes
2
Q
Exothermic is
A
Energy gets released
3
Q
Endothermic is
A
Energy is taken in
4
Q
Positive energy released is
A
Exothermic
5
Q
Negative energy released is
A
Endothermic
6
Q
What are cells
A
Contain chemicals that produce a POTENTIAL DIFFERENCE that can power electrical devices.
7
Q
Non renewable batteries…
A
Cannot be used again once these chemicals are used up
8
Q
Rechargeable batteries are able to perform….
A
Reverse Reaction when a p.d is supplied
9
Q
Hydrogen fuel cells…
A
Water is split into Hydrogen and oxygen by electrolysis
When they recombine a voltage is produced
