Question

-. Decomposition brought about by heat is known as thermal
decomposition. What is the difference between thermal
dissociation and thermal decomposition.​

Answer 1

Answer:-

Thermal Decomposition reaction:-

• A chemical reaction in which a single compound splits or decomposes up into two or more substances (elements or compounds) due to heat is known as a thermal Decomposition reaction.

Example: Sodium nitrate on strong heating decomposes to sodium nitrite and oxygen.

$\sf{\large{ 2NaNO _ 3 \longrightarrow 2NaNO_{2} + O_{2} }}$

Thermal Dissociation reaction:-

• A reversible thermal Decomposition reaction is called thermal Dissociation reaction.

That is, In thermal Dissociation reaction, a chemical compound undergoes chemical Decomposition on heating to form simple products. These simple products reunite on cooling to form original compound.

• They are also known as reversible reactions.

Example: Calcium carbonate (lime) , when heated strongly undergoes Decomposition giving rise to Calcium oxide (quick lime) and Carbon dioxide.

$\sf{ \large{CaCO _{3}\longrightarrow CaO + CO _{2}} }$