## molecularity

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

ShravanPatel2B
Posts: 100
Joined: Fri Aug 30, 2019 12:18 am

### molecularity

What is the difference between order and molecularity. Does molecularity have to do more with elementary reactions?

SnehinRajkumar1L
Posts: 101
Joined: Thu Jul 11, 2019 12:15 am

### Re: molecularity

Order of a reaction is the power dependence of the rate on the concentration of the reactants. Molecularity refers to the number of reactants present (unimolecular, bimolecular, etc.)

Bella Townsend
Posts: 50
Joined: Wed Feb 20, 2019 12:18 am

### Re: molecularity

The order of the reaction depends on the pressures or concentrations of the reactants, while molecularity is the amount of different molecules in the reactants.

Tauhid Islam- 1H
Posts: 64
Joined: Fri Aug 02, 2019 12:15 am

### Re: molecularity

Order is an experimental property that is concerned with kinetics or rate laws and can be any number (fractional, integral or even zero) while molecularity is the theoretical property that is concerned with mechanism and is always an integer excepting zero.