Decomposition Reaction Chemistry Example 2

Follow the full solution, then compare it with the other examples linked below.

Example 2

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When heated, calcium carbonate decomposes: CaCO3→CaO+CO2\text{CaCO}_3 \rightarrow \text{CaO} + \text{CO}_2. Classify this reaction and explain why heat is needed.

Solution

  1. 1
    One reactant produces two products: this is a decomposition reaction.
  2. 2
    The reaction is endothermic — energy is required to break the bonds holding CO32−\text{CO}_3^{2-} together.
  3. 3
    Heat provides the activation energy needed to overcome the stability of the carbonate structure.

Answer

Decomposition reaction (endothermic, requires heat)\text{Decomposition reaction (endothermic, requires heat)}
This reaction is used industrially to produce lime (CaO) from limestone (CaCO3\text{CaCO}_3) in a process called calcination, carried out in kilns at temperatures above 840°C840°\text{C}.

About Decomposition Reaction

A chemical reaction in which a single compound breaks down into two or more simpler substances (elements or simpler compounds), typically requiring an energy input.

Learn more about Decomposition Reaction →

More Decomposition Reaction Examples

Example 1 easy

Write the balanced equation for the decomposition of water by electrolysis.

Example 3 easy

Classify: [formula].

Example 4 hard

Hydrogen peroxide ([formula]) slowly decomposes into water and oxygen gas. Write the balanced equati

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