# Differentiate between the following: Thermal decomposition and thermal dissociation. - Chemistry

Distinguish Between

Differentiate between the following:

Thermal decomposition & thermal dissociation.

#### Solution

Thermal decomposition and thermal dissociation.

• Thermal decomposition: “A chemical reaction in which a compound decomposes into two new substances by heat.” It is not a reversible reaction.
$\ce{CaCO3->[\Delta]CaO + CO2}$
• Thermal dissociation: “Is decomposition of a compound into two or more new substances by heat energy.” It is a reversible reaction.
$\ce{NH4Cl⇌[heat][cool]NH3 + HCl}$
Concept: Types of Chemical Change or Chemical Reaction
Is there an error in this question or solution?

#### APPEARS IN

Viraf J. Dalal Class 9 Simplified ICSE Chemistry
Chapter 2 Chemical Changes & Reactions
Chemical Changes & Reactions | Q 4.3