Difference between finding general rate and using rate laws


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Natalie Yakobian
Posts: 45
Joined: Fri Sep 25, 2015 3:00 am

Difference between finding general rate and using rate laws

Postby Natalie Yakobian » Mon Feb 15, 2016 2:56 pm

Hi,
I'm confused as to the difference between finding the rate of reaction using the formula 1/a[A]/deltaT or by finding it through rate law formulas like first, second, zero order.

Can someone please explain this?


Thank you!

PaigeBlack
Posts: 32
Joined: Fri Sep 25, 2015 3:00 am

Re: Difference between finding general rate and using rate l

Postby PaigeBlack » Mon Feb 15, 2016 4:36 pm

finding the rate of reaction using the formula 1/a[A]/deltaT results in a value representing the unique AVERAGE rate of a reaction. In other words, it's an approximation. However, the rate law formulas are derived using calculus and therefore account for infinitely small intervals of time and are able to find the instantaneous rate of a reaction, giving a more accurate value at a specific time.


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