rate of reaction

[sachinmachin]

hi
just completed the insight 2009 paper, and found it to be doable. have a one question though:

- doesn't increasing the temperature increase the frequency of collisions? according to insight, increasing the temperature ONLY increases the rate by primarily giving reactant particles more energy, thus to overcome the activation energy. please expain..

[Edmund]

Increasing the temperature increases the number of particles with higher kinetic energy (Look at one of those graphs in your book). With particles having more kinetic energy, rate increases so activation energy can be overcome.

[sachinmachin]

yeh, but if it has higher kinetic energy, shoudnt the frequency of collisions increase??

[arthurk]

Im not sure but i think the question said JUST increasing frequency of collisions
emphasis on the JUST

[Edmund]

yeh, but if it has higher kinetic energy, shoudnt the frequency of collisions increase??

Yes

[sachinmachin]

yeh, but if it has higher kinetic energy, shoudnt the frequency of collisions increase??

Yes

thanks edmund

[Mao]

Increasing temperature increases the average kinetic energy, which increases the mean velocity of particles. This has two effects: 1) increases the frequency of collisions, and 2) increases the proportion of successful collisions

[naved_s9994]

..what do you mean by successful collisions

[sachinmachin]

..what do you mean by successful collisions

he means collisions that actually have sufficient energy to overcome the activation energy barrier.