What is the term for a reaction in which a compound breaks down into simpler substances when heated?

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Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

Multiple Choice

What is the term for a reaction in which a compound breaks down into simpler substances when heated?

Explanation:
When a compound breaks down into simpler substances because heat is applied, the process is called thermal decomposition. Heat provides the energy needed to break chemical bonds, allowing the original substance to split into two or more products. This is different from oxidation or reduction, which involve changes in electron transfer or oxygen content, and from precipitation, which is the formation of a solid from dissolved ions. For example, heating calcium carbonate gives calcium oxide and carbon dioxide, illustrating how heat drives the breakdown into simpler substances.

When a compound breaks down into simpler substances because heat is applied, the process is called thermal decomposition. Heat provides the energy needed to break chemical bonds, allowing the original substance to split into two or more products. This is different from oxidation or reduction, which involve changes in electron transfer or oxygen content, and from precipitation, which is the formation of a solid from dissolved ions. For example, heating calcium carbonate gives calcium oxide and carbon dioxide, illustrating how heat drives the breakdown into simpler substances.

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