Question

Give some examples of second-order chemical reactions.

Answer 1

A second-order reaction is a chemical reaction in which the concentration of two first-order reactants or one second-order reactant determines the outcome. This reaction moves at a rate equal to the product of two reactant concentrations and the square of one reactant concentration.

Complete answer:
A second-order reaction is a chemical reaction in which the concentration of two first-order reactants or one second-order reactant determines the outcome. This reaction moves at a rate equal to the product of two reactant concentrations and the square of one reactant concentration.
The number of the exponents in the rate law equals two in a second-order reaction, which is why it is called a second-order reaction.
The rate of such a reaction can be written either as $r = k[A]^2$, or as r = k[A][B].
Examples of Second Order Reactions
The two examples are second-order reactions that are based on the concentrations of two different first-order reactants.
${H^ + } + O{H^ - } \to {H_2}O$
Hydrogen ions and hydroxyl ions form water in the reaction described above.
$C + {O_2} \to CO + O$
Another kind of combustion reaction occurs as oxygen molecules combine with carbon to produce oxygen atoms and carbon monoxide.
One second order reactant yields the product in these reactions.
$2N{O_2} \to 2NO + {O_2}$
$2HI \to {I_2} + {H_2}$
Second-order reactions are chemical reactions that are dependent on the concentrations of either two first-order reactants or one second-order reactant.

Note:
A second-order reaction is a chemical reaction in which the concentration of two first-order reactants or one second-order reactant determines the outcome. This reaction moves at a rate equal to the product of two reactant concentrations and the square of one reactant concentration.