C2.5 - Exothermic and Endothermic Reactions Flashcards
1
Q
Where is energy transferred from during chemical reactions?
A
The surroundings.
2
Q
What is an exothermic reaction?
A
One which transfers energy INTO the surroundings.
3
Q
What are some examples of exothermic reactions?
A
Combustion, oxidation reactions and neutralisation.
4
Q
What is an endothermic reaction?
A
One which takes energy IN from the surroundings.
5
Q
What are some examples of endothermic reactions?
A
Thermal Decomposition, and some sports injury packs.
6
Q
What happens when a reversible reaction is exothermic in one direction?
A
It is endothermic in the other direction. The same amount of energy is transferred in each case.
7
Q
Give a word equation for a reversible reaction:
A
hydrated copper sulphate anhydrous copper sulphate + water
