## First order reactions vs second order reactions [ENDORSED]

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

Megan Purl 1E
Posts: 49
Joined: Fri Sep 29, 2017 7:07 am

### First order reactions vs second order reactions

What is the difference between a first-order reaction and a second-order reaction?

604807557
Posts: 51
Joined: Wed Nov 16, 2016 3:02 am

### Re: First order reactions vs second order reactions

A first order reaction will have an overall order of one, the sum of all the exponents will be 1. A second order reaction will have an overall order of 2, the sum of all the exponents will be 2.

Matthew Lin 2C
Posts: 30
Joined: Fri Sep 29, 2017 7:06 am

### Re: First order reactions vs second order reactions  [ENDORSED]

In a first order reaction, doubling the concentration of the reactant will double the rate of the reaction. In a second order reaction, doubling the concentration of the reactant will quadruple the rate of the reaction. Hope this helps!

mayasinha1B
Posts: 70
Joined: Fri Sep 29, 2017 7:04 am

### Re: First order reactions vs second order reactions

The order of a reaction refers to the index, or exponent, to which its concentration term in the rate equation is raised.