first order reaction vs second order reaction


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Alexis Robles 2k
Posts: 100
Joined: Wed Sep 18, 2019 12:18 am

first order reaction vs second order reaction

Postby Alexis Robles 2k » Sun Mar 08, 2020 9:46 pm

What is the difference between the first-order and the second-order? When do we use one over the other? Thanks

Kimberly Koo 2I
Posts: 99
Joined: Sat Aug 17, 2019 12:17 am

Re: first order reaction vs second order reaction

Postby Kimberly Koo 2I » Sun Mar 08, 2020 9:49 pm

First order means that the concentration of a single reactant is raised to the first power. For a second order reaction, the concentration of 2 reactants is raised to the first power or the concentration of a single reactant is raised to the second power. The order of a reaction is determined by the sum of the powers of the concentrations of reactants in the rate law equation.

Ryan 1K
Posts: 101
Joined: Fri Aug 09, 2019 12:15 am

Re: first order reaction vs second order reaction

Postby Ryan 1K » Sun Mar 08, 2020 9:50 pm

If you have a graph, you can differentiate based on what graph shows a straight line (ln [A] vs ). If you have the rate laws or chemical equations, you can determine which order the reactions are based on the numbers and ratios of the reactants.


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