## order

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

Jesse Kuehn 1B
Posts: 40
Joined: Wed Nov 14, 2018 12:23 am

### order

how do we calculate or know what the reaction order is and what does the reaction order mean?

Fiona Jackson 1D
Posts: 30
Joined: Fri Sep 28, 2018 12:22 am

### Re: order

Hi! The reaction order is essentially the sum of all the exponents of the concentrations in the rate law.

Jennifer Su 2L
Posts: 47
Joined: Wed Nov 21, 2018 12:20 am

### Re: order

The order of a rate law is the sum of the exponents of its concentration terms. More specifically, the reaction order is the exponent to which the concentration of that species is raised, and it indicates to what extent the concentration of a species affects the rate of a reaction, as well as which species has the greatest effect. The order of the reactant (n) gives insight into the reaction mechanism.

Sarah Kiamanesh 1D
Posts: 30
Joined: Fri Sep 28, 2018 12:22 am

### Re: order

using experimental data, as shown in lecture, we isolate changing concentrations of reactants by keeping the others constant and divide the rate and concentrations to obtain the order for that particular reactant. After doing so for each, we sum all of these orders to attain the overall reaction order.

haleyervin7
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am

### Re: order

Is it possible to know the order based on the balanced chemical equation? What other information would you need?