Reactions Flashcards
1
Q
What is activation energy?
A
Min energy required to cause bonds to break and t.f. start a reaction e.g thermal
2
Q
How is energy transferred when:
1) bonds are broken
2. bonds are made
A
- endothermic
2. exothermic
3
Q
What is bond energy?
A
Energy required to break a particular bond
4
Q
How do we know if a reaction is exo/endothermic using its bond energies?
A
if sum of energy values is neg = exothermic and vice versa
5
Q
What unit is used for measuring bond energies?
A
kJ/mol
6
Q
What conditions are needed for a reaction to occur? (2)
A
- Collisions of particles
2. Collision energy > activation energy
7
Q
How do catalysts increase ROR?
A
Lower activation energy = Inc likeliness of successful collisions
