Types Of Chemical Reactions Based On Energy Changes During The Reaction

Endothermic Reactions 

Endothermic Reactions are those types of reactions in which the body produces heat. The term “endothermic reaction” means to respond in which a system absorbs energy from its surroundings in the form of heat. Melting ice, dry ice, alkanes cracking, Photosynthesis, evaporating liquids, thermal decomposition, ammonium chloride in water, and many other endothermic processes are examples.

Exothermic Reaction

It is the opposite of an endothermic reaction. Exothermic Reaction gives off energy to their surroundings in the form of heat or light. Neutralization, burning of a substance, fuel reactions, deposition of dry ice, respiration, sulfuric acid solution in water, and many more processes are examples.

Types Of Chemical Reactions Based On Reaction Mechanism

Combination Reaction

A combination reaction is one in which two or more reactants merge to generate a single product. It is popularly known as synthesis reaction. It is expressed as X + Y → XY

Combination reaction example 2Na + Cl₂ → 2NaCl

Decomposition Reaction

A decomposition reaction occurs when a single chemical breaks down into two or smaller compounds.

It has the shape of XY → X + Y

The decomposition reaction is the opposite of a combination reaction.

A decomposition reaction might look like this CaCO₃ → CaO + CO₂

A thermal decomposition reaction occurs when a chemical decomposes which is the heating.

Displacement Reaction

A chemical process in which a more reactive element is displaced from its aqueous salt solution and replaced by a less reactive element is called a displacement reaction.

It’s written as X + YZ → XZ + Y

A substitution reaction is another name for it.

Zn + CuSO₄ → ZnSO₄ + Cu

Double Displacement Reaction

A double displacement reaction can be defined as the chemical process in which ions are Interchanged between two reactants to generate a new molecule.

It is written as XY + ZA → XZ + YA

BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl this is the example of the above reaction, double displacement reaction.

Types Of Chemical Reactions Based on The Transfer Of Electrons

• Oxidation Reaction The absence of electrons in an atom, molecule, or ion during a reaction is referred to as an oxidation Reaction. When the oxidation state of an atom, molecule, or ion is increased, this is referred to as oxidation.

The loss of a hydrogen atom is referred to as oxidation, whereas the gain of a hydrogen atom is referred to as reduction. The production of ethanal from ethanol is an example of an oxidation reaction 

CH₃CH₂OH → CH₃CHO

• Reduction reaction Reduction is a half-reaction in which a substance reduces its oxidation number by obtaining electrons, which is commonly done by gaining electrons. Iron rusting is a two-step process including oxidation and reduction. In this reaction, Iron(Fe)  is oxidized while oxygen(O) is reduced.

Redox Reaction

Redox is a term that combines the keywords reduction and oxidation. Redox reaction is a type of chemical reaction that includes the transfer of electrons between two substances. Both oxidation and reduction occur simultaneously in these processes.

Conclusion

A chemical reaction is a process defined by a chemical change in which the reactants (starting materials) differ from the results. Chemical reactions are characterized by the movement of electrons, which results in the creation and breaking of chemical bonds. There are several types of chemical reactions and more than one way to describe them.