Topic 7b- Energetics (paper 2) Flashcards
1
Q
What is an exothermic reaction?
A
A reaction in which energy is given out which causes the surroundings to heat up.
2
Q
What is an endothermic reaction?
A
A reaction in which energy is taken in from the surroundings causing the surroundings to cool.
3
Q
What is activation energy?
A
The minimum amount of energy the reactant particles need when they collide with each other in order to react.
4
Q
Is energy needed to:
break bonds or make bonds?
A
Energy is needed to break bonds.
Energy is released when making bonds.
5
Q
What are examples of reactions that are exothermic?
A
- combustion
- neutralisation reactions
- many oxidation reactions
6
Q
what happens when bonds are broken?
A
energy is used (endothermic)
7
Q
what happens when bonds are made?
A
energy is released (exothermic)
