## What is the order of a reaction?

$\frac{d[R]}{dt}=-k[R]; \ln [R]=-kt + \ln [R]_{0}; t_{\frac{1}{2}}=\frac{0.693}{k}$

Diviya Khullar 1G
Posts: 59
Joined: Fri Sep 28, 2018 12:19 am

### What is the order of a reaction?

Hi,
I am having trouble understanding conceptually what the order of a reaction is. What is the difference between a first and second order reaction?

Chloe Thorpe 1J
Posts: 77
Joined: Fri Sep 28, 2018 12:16 am

### Re: What is the order of a reaction?

In a first order reaction, the reaction rate is proportional to the concentration to the first power. In a second order reaction, the reaction rate is proportional to the concentration squared.

Posts: 63
Joined: Fri Sep 28, 2018 12:19 am

### Re: What is the order of a reaction?

in other words:

first order: Rate=k[A]
(rate doubles)
second order: Rate=k[A]^2