rates of reactions

in chemistry how does concentration, temperature, and catalysts affect the rate of a reaction?

i know temperature is to do with the collison theory, and catalysts speed up reactions by lowering the activation energy, but i need information in more detail than that if possible...

cheers...
xXx

Reply 1

BCHL85

12

ainat87

in chemistry how does concentration, temperature, and catalysts affect the rate of a reaction?

i know temperature is to do with the collison theory, and catalysts speed up reactions by lowering the activation energy, but i need information in more detail than that if possible...

cheers...
xXx

You're right.
Concentration and pressure make the molecules closer together, so there are more collisions, and more collisions are successful(obtain energy higher than Ea) per second -> rate increases.

Temperature makes the molecules move faster, they have higher kinetic energy, so more collisions are successful per second -> rat increases

Catalyst provide another way for reaction with lower Ea, so more collisions obtain energy greater than Ea per second, so rate increases

Reply 2

FlutterByKisses

OP

1

thanks... thats very useful. :smile:

thanks for the help.

rates of reactions

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