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Chemical Changes and Reaction — CHEMISTRY STD 9 — Question

ICSE BoardEnglish MediumSTD 9CHEMISTRYChemical Changes and Reaction2 Marks
Question
what do you understand by the term thermal dissociation? How thermal dissociation is different from thermal decomposition? Write two fully balanced equations for thermal dissociation reactions.
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Answer

Thermal dissociation is conventionally understood to be a breakdown of chemical bonds in molecules resulting in production of smaller molecules or atoms under the influence of temperature.
Thermal decomposition is breaking a compound into two or more elements, or into two new compounds with the help of heat. These reactions are irreversible. Thermal dissociation is breaking a substance into two or simpler substances with the help of heating.

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