Why are decomposition reactions called the opposite of combination reaction? Write equation for these reactions?

Question

Answer

In a combination reaction two or more reactants give a single product
but
in decomposition one reactant give two or more than two products

Answer

In decomposition reaction one compound is divided or broken down into two or more molecules.
In combination reaction two molecules or one molecule and one compound or two compounds combine together to form a single compound.
Therefore decomposition reaction is called the opposite of combination reaction

Answer

In a combination reaction two or more substances are combined to form new substance while in the decomposition reaction one substance decomposes into two or more substances. Hence, the decomposition reactions are called opposite of combination reactions.

Answer

Introduction:
Decomposition reactions and combination reactions are two types of chemical reactions that involve the breaking and formation of chemical bonds. While combination reactions involve the combination of two or more substances to form a single product, decomposition reactions are the opposite, as they involve the breakdown of a single compound into two or more simpler substances.

Definition of Decomposition Reactions:
Decomposition reactions refer to chemical reactions in which a single compound breaks down into two or more simpler substances. These reactions are often triggered by heat, light, electricity, or the presence of a catalyst.

Opposite of Combination Reactions:
Decomposition reactions are considered the opposite of combination reactions because they involve the reverse process. Combination reactions involve the combination of reactants to form a single product, while decomposition reactions involve the breakdown of a single compound into multiple products.

Equation for Decomposition Reactions:
Decomposition reactions can be represented by various types of equations depending on the specific compound being decomposed. Here are a few examples:

1. Thermal Decomposition:
AB → A + B
Example: 2H2O → 2H2 + O2 (water decomposes into hydrogen gas and oxygen gas)

2. Electrolytic Decomposition:
AB → A+ + B-
Example: 2NaCl → 2Na+ + Cl- (sodium chloride decomposes into sodium cations and chloride anions)

3. Photolytic Decomposition:
AB + light energy → A + B
Example: 2AgBr + light energy → 2Ag + Br2 (silver bromide decomposes into silver metal and bromine gas under the influence of light)

Explanation:
Decomposition reactions occur because the compounds involved in the reaction have a higher energy state or are unstable. The energy input, such as heat or light, provides the activation energy required to break the chemical bonds within the compound.

Decomposition reactions can occur through different mechanisms, such as thermal decomposition (due to heating), electrolytic decomposition (due to the flow of electric current), or photolytic decomposition (due to the absorption of light energy).

These reactions are important in various natural and industrial processes. For example, the decomposition of organic matter in composting or decay processes involves the breakdown of complex compounds into simpler substances. In industrial applications, decomposition reactions play a crucial role in the production of various chemicals.

Conclusion:
Decomposition reactions are called the opposite of combination reactions because they involve the breakdown of a single compound into simpler substances, while combination reactions involve the formation of a single compound from multiple reactants. The equations for decomposition reactions can vary depending on the specific compound and the conditions under which the reaction occurs. These reactions are driven by the need to achieve a lower energy state and increased stability.

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