Rate of reactions Definitions Flashcards
1
Q
Activation energy
A
The minimum energy needed to start a reaction
2
Q
Endothermic reaction
A
Reactions which transform thermal energy into chemical potential energy ∴ ΔH >0
3
Q
Exothermic reaction
A
Reactions which transform chemical potential energy into thermal energy
∴ ΔH<0
4
Q
Activated complex
A
High energy, unstable transition state between reactants and the products
5
Q
Transition state
A
The state which corresponds to the highest potential energy along its reaction co-ordinate
6
Q
Heat of reaction (ΔH)
A
The net change of chemical potential energy of the system
7
Q
Rate of reaction
A
Change in amount or concentration per unit time of either reactant or product
8
Q
Catalyst
A
Substance that increases the rate of the reaction but remains unchanged at the end of the reaction
