reaction rates? Flashcards
1
Q
describe the effect of catalysts on rate of reaction
A
- provides an alternative pathway for reaction with a lower activation energy
- more particles have the activation energy
- increased rate of reaction
2
Q
what does it mean if a reaction is exothermic?
A
reactants have more energy than products
energy is released
3
Q
what does it mean if a reaction is endothermic?
A
products have more energy than reactant
energy is taken in
4
Q
in which direction does the activation energy arrow go on a reaction profile?
A
from reactants to top of activation curve
5
Q
in which direction does the enthalpy arrow go on a reaction profile?
A
from reactants to products
6
Q
what does the increase in activation energy curve show on a rates graph?
A
molecular bonds stretch due to an increase in kinetic energy
7
Q
what does the activation energy curve peak show on a rates graph?
A
bonds having enough energy to break
8
Q
A
