energy changes Flashcards
1
Q
what is an endothermic reaction
A
a reaction which takes in heat energy
2
Q
what is activation energy
A
the minimum amount of energy needed for a reaction to begin
3
Q
what is the job of catalysts
A
they lower the activation energy for a reaction
4
Q
why does lowering the activation energy increase the rate of reaction
A
more particles have enough energy to react and cause more collisions
5
Q
what is an exothermic reaction
A
a reaction which gives off heat energy
